Pregnancy Calculator
Knowing your most probable fertile day of ovulation and knowing the ovulation time will help you find the best days for conceiving. Based on ovulation time and some other parameters, such as ovule and spermatozoon's lifetime the pregnancy calculator displays the most prospective days for conceiving. Using this calculator you may also to choose the gender of future baby. This calculation is based on the fact that female's X-chromosomes live longer and are less active than are male's Y-chromosomes. Having sexual intercourse three days before ovulation, you have more chances to conceive a girl. Your chances to conceive a boy greatly increase if your sexual intercourse takes place closer to the ovulation moment. But, if you intent to avoid pregnancy, you have to abstain from unprotected sexual intercourse during your fertile days.