Basic Thought 1: Before Start Opinions: most important thing is the ovulation date to help choose the chromosome you desire. There two sex chromosomes, that is, X and Y. Two deferent kinds of sperms we have, depending on X chromosome sperm (XS) or Y (YS). XS makes female organ while YS makes male organ. XS can live for three days, but YS can live only 24 hrs. XS therefore can swim for three days during which time it can reach to an ovum (the female egg). So, most of the time YS will die in the middle of the trip to the ovum, if the distance or trip takes more than 1 day. Moreover, before an ovum leaves (dies) the mother's body, it can wait only three days from the time of ovulation date (usually sometime after 7 - 14 days after mother's period end). It does not wait for any sperm after three days under no circumstances. Thus, making love on the ovulation day is the most important thing, I think. To Basic Thought 2 |