Pregnancy Chances After Abortion and Contraceptive Use - Obstetrics and Gynecology

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What is the likelihood of conception in this situation?


Hello, Dr.
Lin.
I would like to ask you a question.
I underwent a medical abortion on December 27 of last year, and my first menstrual period after the procedure was on January 29 of this year.
I started taking a 21-day oral contraceptive pill on February 1.
On February 3, I had a little bit of bleeding left, and by the morning of February 4, there was no bleeding.
That evening, I had sexual intercourse without using a condom.
My menstrual cycle is usually around 28 days.
What are the chances of getting pregnant in this situation? Additionally, could you please explain how to correctly calculate the safe period? Thank you!

Ting Ting, 20~29 year old female. Ask Date: 2007/02/04

Dr. Lin Zhaopei reply Obstetrics and Gynecology


Menstruation started on January 29, and oral contraceptives should be taken on February 2.
At this point, there is no need to wait for the menstrual flow to stop.
February 4 marks the 7th day of the menstrual cycle, which is not considered a fertile period, so pregnancy is unlikely.
The menstrual cycle is typically 28 days, with the fertile window approximately from days 11 to 16 of the cycle, roughly from February 8 to February 13.
However, this is just a rough estimate; tracking basal body temperature is a more accurate method for determining ovulation.

Reply Date: 2007/02/04

More Info


Hello! Thank you for your question regarding the chances of pregnancy after an abortion and contraceptive use. It's great that you're seeking information to understand your reproductive health better.

After an abortion, it is possible to conceive again quite quickly, sometimes even within the first cycle after the procedure. In your case, you had an abortion on December 27, and your first menstrual period post-abortion was on January 29. This indicates that your body has resumed its normal menstrual cycle, which is a positive sign of recovery.

You started taking a 21-day oral contraceptive pill on February 1, which is designed to prevent ovulation and thus reduce the chances of pregnancy. However, it is important to note that the effectiveness of oral contraceptives relies on consistent and correct usage. Since you began taking the pill just a few days after your period ended, it is likely that you were still within a window where the pill had not yet fully taken effect, especially since it typically takes about seven days of consistent use for the contraceptive to be fully effective.

On February 4, you engaged in unprotected intercourse. Given that your menstrual cycle is around 28 days, ovulation would typically occur around day 14 of your cycle. However, since you had just started the pill, your body may not have been fully suppressed in terms of ovulation, which could mean that there is a possibility of becoming pregnant if ovulation occurred shortly after you started the pill.

In terms of calculating the "safe period," this method involves tracking your menstrual cycle to identify the days when you are least likely to conceive. Generally, the fertile window is considered to be the six days leading up to and including ovulation. For a 28-day cycle, ovulation usually occurs around day 14. Therefore, the days to avoid unprotected intercourse would be approximately from day 10 to day 17 of your cycle. However, this method can be unreliable due to variations in cycle length and ovulation timing, so it is often recommended to use additional contraceptive methods for better protection.

In summary, while the chances of pregnancy after your recent sexual encounter are not negligible, they are somewhat reduced due to your use of oral contraceptives. However, since you started the pill just a few days before intercourse, the risk of pregnancy remains. If you are concerned about the possibility of pregnancy, consider taking a home pregnancy test if your next period is late, or consult with your healthcare provider for further advice.

Lastly, if you have any ongoing concerns about your reproductive health or contraceptive options, I encourage you to discuss them with your healthcare provider, who can provide personalized guidance based on your medical history and lifestyle. Wishing you the best in your health journey!

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