A menstrual cycle can be as short as 22 days or as long as 36 days. On average, a woman gets her period between 12 days and 14 days after she s ovulated. If you have a 28-day menstrual cycle, you re likely to ovulate around the middle of your cycle (day 14). Most of the confusion is caused by delayed ovulation, which happens when the woman ovulates very late in the cycle. Another factor that causes confusion regarding pregnancy is irregular period. If you have regular periods, you can easily map your ovulation days. Anyway your wife’s blood test is positive for pregnancy and you want confirmation. It is very simple. Get done ultrasound. I will visualize the fetus in womb. It will also tell you the health status of the fetus and gestation age. Advice 1. Investigations – USG abdomen If USG also turns positive for pregnancy then 1. Consult an obstetrician 2. Avoid strenuous activity 3. Further investigation – Hb%, HIV screening, HBsAg, HCV screening and VDRL. Don’t worry these tests are recommended to every women who are pregnant as a precautionary measure. Thanks