Patient's question:
Detailed medical condition and consultation purpose: I had my period on October 7th, and it usually lasts for three days (with a very heavy flow in between). My cycle is generally 28 days, and it's very regular. However, this month, by November 13th, I was very tired from shopping. That's when I noticed a small amount of reddish-brown blood coming from my lower body. Over the next few days—14th and 15th—it was just a little bit each day, but by the 16th and 17th, it increased a bit, along with some small blood clots. Today, it's about the same as the 17th. I also have occasional abdominal pain.Other information: On the 29th, I had a superficial injury on my body that caused a lot of bleeding. At the time, there was also a small amount of reddish-brown blood coming from my lower body.
Doctor's answer:
The date of ovulation is generally about 14 days before the next menstrual period begins, starting from the first day of the next menstrual period. Counting backward 14 days or subtracting 14 days from the first day of the next menstrual period gives the ovulation day. The ovulation day, along with the 5 days before it and the 4 days after it, together constitute the fertile window. The specific calculation depends on your menstrual cycle, and it requires an accurate menstrual cycle to ensure the correctly calculated fertile window.External ejaculation cannot completely rule out the possibility of pregnancy, as sperm may also be released during intercourse. If your menstrual period is delayed by more than a week, it is still necessary to use a pregnancy test to rule out the possibility of pregnancy.
If you are not planning to become pregnant, it is essential to take other safe contraceptive measures to avoid an unintended pregnancy.