September 28th is the first day of menstruation; which day is most likely for conception?

Pregnancy refers to gestation. Under normal circumstances, if menstruation occurs on September 28, conception is more likely around October 12. The specific analysis is as follows:

Menstruation is the shedding and bleeding of the uterine lining that occurs in response to cyclical changes in the ovaries. Women are generally more likely to conceive during the ovulation period, which includes several days before and after ovulation day, typically spanning about 10 days. During this period, hormonal levels in women favor sperm production and motility, while the ovaries release mature eggs, increasing the chance of conception. For women with regular menstrual cycles, ovulation usually occurs approximately 14 days before the next menstrual period begins. Healthy women of reproductive age typically have menstrual cycles ranging from 21 to 35 days, averaging 28 days. If calculated based on a 28-day cycle, ovulation following menstruation on September 28 would likely occur around October 12. Therefore, intercourse on October 12 is more likely to result in pregnancy.

During menstruation, it's important to maintain adequate nutrition, emotional stability, sufficient rest, and moderate exercise. It's also essential to ensure sufficient sleep and avoid staying up late. If discomfort or unusual symptoms occur, seek medical attention promptly and follow standardized treatment under a doctor’s guidance, which helps support recovery and overall health.