The menstrual cycle of 32 days, the 11th came to the period, the 20th coitus, the possibility of pregnancy will not be very large, but need to rule out the unexpected. The day of ovulation refers to the 14th day before the next menstrual period, the day of ovulation plus 5 days before and 4 days after the day of ovulation, a total of about 10 days, as the ovulation period. If a woman has a 32-day menstrual cycle and gets her period on the 11th, ovulation is likely to occur between the 25th of the month and the 4th of the following month, and the 20th is not in the range of ovulation, so pregnancy is not very likely. If a woman has an irregular menstrual cycle, she may become pregnant if she has unprotected intercourse on the 20th when a mature follicle discharges an egg. This is an unexpected situation and is relatively rare.