It is difficult to pinpoint the exact day of conception. This calculator will provide you with an estimate of the date of conception. The exact date of conception may differ from the date of intercourse.
Conception can occur up to at least six days after intercourse.
The egg is only viable for about 24 hours, but sperm can stay viable in the cervical mucus for up to six days. If a woman has regular cycles, usually the time of conception can be pinpointed to within a week or two. If they are irregular it is more variable. Ultrasounds performed during the pregnancy, especially if done early, are usually accurate to within one week. All rights reserved.