How to Tell if You’re Pregnant When You’re Taking Birth Control

on Nov 04, 2012

by Dr. Prabha Sahgal, MD

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How to Tell if You’re Pregnant When You’re Taking Birth Control

Although birth control pills prevent you from getting pregnant, they are not 100% effective. With the slight possibility of pregnancy, find out how to tell if you're pregnant when you're taking birth control.

Although birth control pills have the role to prevent you from getting pregnant, none of these treatments are 100% effective. As a result, you can conceive even when you take your pills on a daily basis, without realizing it, so, the following information on how to tell if you’re pregnant when you’re taking birth control should come in very handy. Here is a list with the 6 most common and easy to notice symptoms. Claim Your 20 Free Pregnancy Tests – Click Here


If you feel exhausted during the day, even having enough sleep, it may be a sign that you are pregnant. As soon as the egg is fertilized and it is implanted in the uterus, the body begins to produce increased amounts of progesterone, a hormone that plays an important role during pregnancy. The process can make you feel tired and sleepy.


Nausea, manifested especially in the morning, is another sign of pregnancy, not necessarily related to the birth control pills you were taking, that appears after two weeks from the fertilization of the egg, or in the second half of the first pregnancy trimester.


Light cramps in the lower part of the abdomen is another symptom common to most lists on how to tell if you’re pregnant when you’re taking birth control pills. This symptom, also known as uterine cramps, appears when the egg is implanted in the uterus, and it is experienced in the first couple of weeks following conception.

Weight fluctuations

Unusual weight fluctuations can also indicate a pregnancy, being the result of the secretion of certain hormones in quantities greater than normal. While some women start to put on weight as soon as they conceive, others may lose some pounds in their first weeks of pregnancy.

Light bleeding

A light bleeding, called implantation bleeding, that occurs after the period may also be a sign that you conceived while taking birth control pills. This symptom is the result of the egg being attached to the lining of the uterus, and it usually happens in the first or second week after the egg is fertilized.

Rise in basal temperature

A higher than normal basal temperature is usually considered a symptom of the forthcoming ovulation. However, if the temperature remains elevated for days and even weeks after the egg is released, it is a great possibility for the fertilization to take place even under the influence of the birth control pills.

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How to Tell if You’re Pregnant When You’re Taking Birth Control, 4.4 out of 5 based on 9 ratings

Dr. Prabha Sahgal MD, is board certified in obstetrics and gynecology and subspecialty board certified in reproductive endocrinology and infertility. Dr. Sahgal holds a B.S. degree from MIT in molecular biology and currently serves on the ConceiveEasy board of directors.

Related posts:

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  2. Infertility and Birth Control Pills
  3. Getting Pregnant After Birth
  4. Stages of Labor and Birth
  5. Period or Early Pregnancy Bleeding?
  • Sherry Cobwell

    Hi , I’m 22 years old and I’m very anxious right now. My boyfriend ejaculated in me a couple of weeks ago and we were both drunk that night and I’ve been on the look out to see if I’m pregnant or not . I’m on birth control but I took my BC pill the morning after , a week later since that happened I haven’t notice these signs until now which were crampy stomach, nausea, sore breast, and a lot more BUT I got my period and its heavy so now I’m confused , could I still be pregnant ???

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  • mkmk

    what ended up happening, this is similar to my situation right now

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  • Kentasia

    Hi Im 19 and I just got on birth control in late November, very first time . today is January 15 . I only had a period for about 2 weeks in December. My boyfriend and I has protected and unprotected sex but on the 1st of January we had unprotected sex. After that I’ve been having a weak stomach from certain foods, alcohol, people smoking . feeling sick , extra sleepy and cramping and my body been aching. I take my next shot feb 15 but is it possible that I’m pregnant since this is the very first time in my life being on birth control .

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  • sue

    i been on birth control i have one more row to finsh but i been very sleepy and im scared

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  • Chloe

    I am only one week late and I’ve missed my pilll a couple of times but doubled up the next night, I’ve consumed alcohol while being on the pill. Last period was just before christmas and I haven’t had it since I’ve been having sex nearly every single day some days more then once. feeling sick,light headed and after food I don’t feel to well, moody do you think its possible that im pregnant. I’ve only been on the pill for 6-5 months

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  • fc95

    I’ve been on the pill (Lutera) for over a year now, with some short breaks in between. I’ve been taking it consecutively now for about 6 months. On January 9th I had unprotected sex and accidentally threw up a pill, then began spotting two days later which turned into a very light bleed that continued for the next 11 days. For 7 of those days I was on an antibiotic to treat a UTI, which I believe contributed to that bleeding. Which, would have left me unprotected. I also somehow missed another pill without realizing it. I had unprotected sex with my boyfriend that weekend (January 23-24), and got my birth control “period” on time on Monday. It ended Sunday, but today I had a light pink discharge that only happened when I went to the bathroom this morning, had cramps like I was getting my period, and I’m bloated out of nowhere. I’ve been really moody and tired lately which I thought was just stress. But now i’m wondering if maybe i ovulated in the time that the antibiotics/missed pills left me unprotected and now I’m pregnant? Sorry this is so long, I’m just worried.

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  • Richard Parker

    My boyfriend and i had unprotected sex and he came in me. What are thr chances of me getting pregnant if I just finished a months worth birth control and still bleeding a little when I took my first pill to start my new birth control package.

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