What If I Dont Know The Date Of My Last Period
Sometimes it is not possible to know when your last period was, and in these cases, the doctor can order a dating ultrasound. My measuring uterine height, the ultrasound technician or doctor can calculate how far along you are as well as your estimated due date. Oftentimes, an ultrasound and a blood test to check beta-HCG levels are ordered together to determine dating.
Read Also: Vagisil While Pregnant
Using Last Menstrual Period
To figure out your due date, count 280 days, or 40 weeks, from the first day of your last period . The LMP method works best for women who have a consistent period with a regular cycle, says Delisa Skeete Henry, MD, an ob-gyn with Serene Health OB/GYN & Wellness in Fort Lauderdale, Floridaand by that she means a cycle ranging from 28 to 38 days. Your estimate can then be refined with what the doctor learns from your pelvic exam. Thats because a typical uterusone without fibroids or massestends to be certain sizes at certain points in pregnancy. The result is accurate plus or minus seven days, Ruiz says.
Calculating Due Date: How To Tell How Far Along You Are
The answer to the question how far along am I? isnt just to satisfy a mom-to-bes curiosity. While getting an accurate due date is tough, its still crucial for your doctor to provide an educated guess. Thats because its still one of the single most important pieces your pregnancy, says G. Thomas Ruiz, MD, ob-gyn lead at MemorialCare Orange Coast Medical Center in Fountain Valley, California.
A large part of your prenatal care depends on that due date, he explains. Knowing how far along you are can help you and your healthcare team track fetal development, mark pregnancy milestones and make decisions about prenatal testing. Having an idea of how long baby has been developing in your belly gives your doctor insight into, for instance, whether labor should be stopped because its premature or whether it should be induced because youre well past your due date, Ruiz says. With this in mind, here are a few at-home and in-office ways to learn how far along you are and what your official due date is.
Read Also: How Hard Is It To Get Pregnant At 35
Your Body At Week 38 Of Pregnancy
The biggest change you might notice in your body at 38 weeks pregnant is an increase in pressure in your lower abdomen. Around this time is when your baby will start to change its position in the womb with the head facing downward in the pelvis.
At 38 weeks pregnant you may be feeling uncomfortable in your body. Your body will feel heavier and you may struggle to find a comfortable position to sit, sleep or even stand for long periods of time. Try to wear clothing that makes you feel as comfortable as possible during this time.
You may find it helpful to choose the right pregnancy bra for you, which will accommodate your changing breast size. Also, your nipples may start to leak colostrum, a nutrient-rich liquid, so dont be alarmed if you notice wetness or yellow stains in your bra.
Conception Date Pregnancy Calculator
Conception Date Pregnancy Calculator is a free online tool that can help you to calculate your estimated due date . You need to enter the first day of your last period, and the Conception Date Pregnancy Calculator will do the rest. The Conception Date Pregnancy Calculator is based on an algorithm developed by obstetricians and is more accurate than other calculation methods, such as using the date of ovulation.
MindTastik.com also offers a Conception Date Probability Calculator, which can help you to determine the probability of conceiving on specific days during your cycle. In addition, ConceptionDate.com offers a range of other free online tools, including a due date calculator and ovulation calculator. Whether you are trying to conceive or are already pregnant, we hope you find these tools helpful!
Read Also: What To Ask Obgyn When Pregnant
Recommended Reading: Is Dove Deodorant Safe During Pregnancy
Pregnancy Symptoms Week 4
If your menstrual cycle is regular, then the first and most reliable indication that youre pregnant is likely to be missing your period after youve been having unprotected sex . However, there are many other reasons for a delayed or missed period and the only way to know for sure is to take a pregnancy test. These are cheap and accessible at your local drugstore, but you may prefer the discretion of your clinic instead.
You may also notice any one of the following general symptoms of early pregnancy:
- nausea or vomiting
What Is Gestational Age Can It Be Different Than What The Calculator Shows
Gestational age is the term used to describe how far along the pregnancy is and how long baby has been gestating .
If you get an ultrasound you may notice a GA on the image with a number of weeks and days. This figure is based on how the baby is measuring, not on your LMP, which the due date calculator uses.
Its normal for these dates to not match up perfectly. If there are significant differences in the dates, your doctor may want to dig deeper to determine conception date. As a result, your midwife or doctor may change your due date based on the ultrasound gestational age.
Early ultrasounds are very accurate when dating a pregnancy and can be helpful if you dont know your LMP or your periods are irregular.
Note that you dont have to have an early ultrasound, especially if you are fairly certain of your cycle length and conception window. This study shows that early dating ultrasounds dont change the incidence of induction.
Also Check: How To Get Rid Of Sciatica Pain While Pregnant
Due Date Calculator: Conception Date
With this calculation, 266 days of pregnancy are added to the date you conceived. But theres a little. You might know the exact date you had sex. But the exact conception date isnt always known. This is because it can be challenging to determine the exact date of ovulation. Sperm can live in the female body for up to 5 days, and the egg can live for 24 hours after its released from the ovary.
Therefore, the conception date can be several days after youve had unprotected intercourse.
What Are The Three Trimesters In Pregnancy
The pregnancy period is divided into three, three-month segments known as trimesters. The division helps understand the changes in the body.
First trimester: It lasts from week one to week 13, when you experience nausea and tiredness.
Second trimester: It lasts from week 14 to week 28. You will feel much better in this period, and your pregnancy bump will be seen. Early pregnancy symptoms such as morning sickness, headache, dizziness, fatigue, etc., slowly disappear.
Third trimester: It lasts from week 29 until you deliver the baby. You will require extra energy to help your baby grow and beat the tiredness .
Also Check: Can You Do Laser Tattoo Removal While Pregnant
What Should I Do Next
If you dont already have a midwife, you may be able to self-refer to your local maternity unit directly for your antenatal care. Visit your local hospitals website to find out more.
Speak to your GP if you cant self-refer or if you think your pregnancy may be high-risk. For example, if you have a long-term condition, had complications in a previous pregnancy or experienced a late miscarriage or stillbirth. Your GP will tell the midwifery team you are pregnant.
You will be given a date for your first appointment with a midwife. This should happen before you are 10 weeks pregnant.
We know pregnancy can be an overwhelming time. We created our Healthy Pregnancy tool to try to take away some of this anxiety by giving you a personalised set of tips for your pregnancy.
Not pregnant yet?
How To Calculate In Weeks
To calculate how many weeks you are, start by taking note of the first day of your last period on a calendar, or your LMD . Every 7 days from that first day counts as 1 week in your pregnancy.
For example, if the first day of the last period was March 11 and you recently had a positive pregnancy test, your first day of pregnancy is March 11 . If March 11 was day 1, then March 18 will mark week 1 of your pregnancy. April 16, for example is calculated as 1 week and 1 day of your pregnancy, and you will have been in your second month.
Calculation is done this way because the exact fertilization day is difficult to determine. Sperm cells can survive in the womans body for up to 7 days, and can fertilize the egg and initiate the pregnancy on any of these days.
Also Check: What Tums Are Safe During Pregnancy
What Do I Need To Know About Using A Pregnancy Due Date Calculator
A due date calculator may not be completely accurate. This is especially true if you arent exactly sure when you had your last period, you have irregular periods or you dont know when you conceived. You should see your provider for a more precise test, such as an ultrasound, to confirm your due date.
Im 7 Weeks 1 Day Pregnant So Im In My 8th Week Of Pregnancy Right
Wrong. You are seven weeks pregnant.
Many moms assume that being 7 weeks and 1 day pregnant means theyre technically in their eighth week of pregnancy. And, while there is definitely logic behind that, its just not the way the medical community answers the question of how many weeks pregnant am I.
Think of it in terms of your age.
If someone asks you how old you are, you say youre 30, whether youre 30 and 3 days or 30 and 364 days. Even the night before your 31st birthday, you still say youre 30, although youve almost completed your 31st year.
So how many weeks pregnant are you? Most mamas answer that by saying how many weeks and days theyve completed:
- Im 8 weeks and 2 days pregnant.
- Ill be 20 weeks pregnant on Monday.
- Im 32 weeks and 6 days pregnant.
You May Like: How To Lose Loose Belly Fat After Pregnancy
Calculate Your Baby’s Due Date
When was the first day of your last period?
What’s the average length of your menstruation cycle?
Your due date is a way of predicting a period of time when you might go in to labour, based on when you conceived. Its a useful way of monitoring your babys growth, either by examining your tummy or by ultrasound scan . Its also a way of your midwife or doctor to accurately plan your care in terms of visits, blood tests and scans .
Most babies are born at full-term which is between 37 weeks and 42 weeks , a period referred to as “term”, when the baby has reached full maturity. On average, most pregnancies last around 40 weeks which is 38 weeks after conception or 280 days. However, no-one can predict exactly when you might go into labour and deliver your baby . If you are expecting twins or triplets, its highly likely that you will deliver well before the actual due date.
Once you know your due date, it can help you prepare and plan for your labour and birth, as well as prepare your home for your baby.
Is This Pregnancy Weeks Calculator Reliable
Like any other Online Calculator, the Pregnancy Weeks Calculator is simply a Pregnancy Calculator designed to help you and provide guidance for your first few weeks of pregnancy. If you are pregnant and you want to be 100% certain on the exact number of days that you have been pregnant, we recommend that you go directly to your doctor.
Recommended Reading: What Causes Migraine Headaches During Pregnancy
Sex At Week 5 Of Pregnancy
Its safe for you to have sex at any stage during your pregnancy. Some women experience an increased sex-drive around this stage. But keep in mind that symptoms like morning sickness can put you off sex when youre around 5 weeks pregnant, which is normal.
Some women can spot lightly after having sex. This happens because your cervix has become more tender and vascularized. Unless the spotting doesnt stop, theres nothing to worry about.
- Take a pregnancy test after missing your period.
- Make your first antenatal appointment with your doctor.
- Start taking a prenatal vitamin.
- Develop healthier eating and exercise habits.
- Drink plenty of water.
- Listen to your body for cues and rest as much as you need.
- Start a pregnancy journal this will help you remember every detail in the years to come!
How Is My Due Date Determined
Normally, your due date is 280 days from the first day of your last period. However, if your periods are not regular or are not 28 days apart, your due date may be different from the “280-day rule.” Your health care provider may order an ultrasound to more accurately determine your due date.
A full-term pregnancy ranges from 37 weeks to 40 weeks and 6 days, so your actual date of delivery can be different from your estimated date of delivery, which is sometimes called estimated date of confinement, or EDC. A very small number of babies are actually born on their due dates. Typically, only 5% percent of women deliver on their due date.
Also Check: Can You Bleed If Your Pregnant
My Cycle Isnt 28 Days Will This Due Date Calculator Work For Me
Yes. The logic behind our pregnancy calculator works as follows:
- The average cycle length is 28 days
- If your cycle length is shorter, your due date will be earlier
- For every day your cycle is shorter, your due date moves one day earlier
How Can I Work Out My Due Date
After finding out you’re pregnant, you will want to know how pregnant you are and when your baby is likely to be born. This can be done by working out your estimated due date.
You can calculate your babys estimated due date based on the date of the first day of your last menstrual period . Your baby will be due around 40 weeks after the first day of your LMP. This method is particularly accurate if you have a regular menstrual cycle. For example, if you have a regular 28-day cycle, add 7 days to the date of the rst day of your last period, then add 9 months.
If your cycle is longer or shorter than 28 days or irregular, working out your due date using the first day of your LMP can be more difficult and may also be more unreliable.
Another way your due date can be calculated is by using ultrasound. By measuring your babys size, doctors can work out how far along your pregnancy is. In early pregnancy your doctor will measure the length from your babys head to your babys bottom. This is called the crown-rump length or CRL. Later in pregnancy, your doctor can measure different parts of your babys body, including your babys head, thigh bone and abdomen to work out an average size and an estimated due date.
Don’t Miss: How Does Depression Affect Pregnancy
First Day Of Your Last Period
The most common way to calculate your pregnancy due date is by counting 40 weeks from the first day of your last menstrual period . And that’s how most healthcare providers do it.
If your menstrual cycle length is the average length , your menstrual cycle probably started about two weeks before you conceived. This explains why pregnancies are said to last 40 weeks instead of 38 weeks.
This method doesn’t take into account how long your menstrual cycle actually is or when you think you might have conceived. But generally speaking, women typically ovulate about two weeks after their menstrual cycle starts. And women are more likely to know when their last period started than the day they ovulated.
How Is Pregnancy Due Date Calculated
Your pregnancy due date is calculated by adding 40 weeks to the first day of your last menstrual period . This is done with an assumption that you have a 28-day menstrual cycle. The time between your menstrual period and ovulation is calculated as the first two weeks of pregnancy, as ovulation takes place two weeks after the first day of LMP. If you deliver the baby on the estimated due date, she is 38 weeks old after conception and not 40 .
If you miss your first period, you are likely to be four weeks pregnant .
You May Like: What To Do If Your Pregnant At 14
Pregnancy By Month: Emphasis On Length Of A Month
This breakdown takes the date of your last menstrual period and counts until the same date of the subsequent months. For example:
If the date of your last menstrual period was April 17:
- Month 1: April 17 through May 16
- Month 2: May 17 through June 16
- Month 3: June 17 through July 16
- Month 4: July 17 through August 16
- Month 5: August 17 through September 16
- Month 6: September 17 through October 16
- Month 7: October 17 through November 16
- Month 8: November 17 through December 16
- Month 9: December 17+
As you can see from the three schedules, there are different ways to describe which month of pregnancy you are in based on how you interpret the weeks. There is no right or wrong way to answer when people want to know how far along you are. Simply provide the week or month you feel is appropriate for your gestational age.