Pregnancy is the carrying of one or more fetus or embryo, inside the uterus of a female human. In a pregnancy, there can be multiple gestations, as in the case of twins or triplets. Human pregnancy is the most studied of all mammalian pregnancies.
Pregnancy occurs as the result of the female gamete or oocyte being penetrated by the male gamete spermatozoon in a process referred to, in medicine, as "fertilization", or more commonly known as "conception". The fusion of male and female gametes usually occurs through the act of sexual intercourse.
pregnancy usually lasts between 37 and 42 weeks, with the EDD at 40 weeks,[9] 38 weeks after conception. 40 weeks is a little more than nine months and six days,
