Can You Get Pregnant If You Have Your Period? - Obstetrics and Gynecology

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Can I get pregnant?


If you have had sexual intercourse and then get your period, does that mean you definitely won't be pregnant? However, if your menstrual cycle is irregular, it may end, but then you experience bleeding again after a week or two.
What could be the reason for this?

Xiao Yu, 20~29 year old female. Ask Date: 2001/01/06

Dr. Wu Zongcheng reply Obstetrics and Gynecology


(1) Pregnancy is only possible during ovulation; intercourse outside of this period does not lead to pregnancy.
(2) It can be difficult to determine whether abnormal bleeding constitutes a menstrual period.
The best method for diagnosis is a pregnancy test.
(3) If spotting occurs after menstruation has ended, it may indicate an endocrine disorder, and it is advisable to undergo endocrine testing at a hospital.

Reply Date: 2001/01/06

More Info


The question of whether you can get pregnant if you have your period is a common concern among individuals trying to understand their reproductive health. To clarify, having a menstrual period typically indicates that you are not pregnant. However, there are nuances to this situation that are important to understand.

Firstly, a menstrual period occurs when the lining of the uterus sheds due to the absence of a fertilized egg. If you have a regular menstrual cycle, the onset of your period generally means that you are not pregnant. However, there are exceptions to this rule, particularly in cases of irregular menstrual cycles or what is known as "cryptic pregnancy."
Cryptic pregnancy is a phenomenon where a woman does not realize she is pregnant until much later in the pregnancy, sometimes even until she is in labor. This can occur for various reasons, including hormonal imbalances, which may cause light bleeding that can be mistaken for a period. In some cases, women may experience what is known as "implantation bleeding," which can occur around the time their period is due and may be confused with a light menstrual flow.

If you have had unprotected sexual intercourse and then experience what appears to be a period, it is still advisable to take a pregnancy test if your period is late or if you have any other signs of pregnancy, such as nausea or breast tenderness. A pregnancy test is most accurate when taken after a missed period, as it measures the hormone hCG (human chorionic gonadotropin), which is produced after a fertilized egg implants in the uterus.

Regarding irregular menstrual cycles, it is not uncommon for women to experience variations in their cycle length and flow. Factors such as stress, significant weight changes, hormonal imbalances, and underlying health conditions can all contribute to irregular periods. If you find that your menstrual cycle is inconsistent, it may be beneficial to consult with a healthcare provider. They can help determine the underlying cause and provide guidance on managing your menstrual health.

In summary, while having a period typically indicates that you are not pregnant, there are exceptions, especially in cases of irregular cycles or cryptic pregnancies. If you have concerns about your menstrual cycle or potential pregnancy, it is always best to consult with a healthcare professional for personalized advice and testing. They can provide you with the most accurate information based on your individual health history and circumstances.

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