Around October 22: With a 31-day cycle, ovulation is around cycle day 17, which means around october 22 in this case. October 17 and 22 are very close together, so if conception occurred, it cannot be certain which day's sperm was involved.
Answered 10/4/2016
4.8k views
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question