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Sexual Health and Pregnancy
Conception
Conception happens when the sperm from the man combine with the egg from the woman. This usually can occur if a couple has unprotected vaginal intercourse, especially in the several days before the woman ovulates. To prevent conception, birth control methods should be used, such as condoms and hormonal contraceptives. Even if the man does not ejaculate inside the vaginal canal, semen that contacts the outside of the vulva can be pulled inside to fertilize an egg. For this...
Pregnancy
Pregnancy is the carrying of one or more embryos or fetuses by female mammals, including humans, inside their bodies.
In a pregnancy, there can be multiple gestations (for example, in the case of twins, or triplets). Human pregnancy is the most studied of all mammalian pregnancies. Human pregnancy lasts approximately 9 months between the time of the last menstrual cycle and childbirth (38 weeks from fertilisation). The medical term for a pregnant woman is genetalian, just as the medical term for the potential baby is embryo (early weeks) and then fetus (until birth). A woman who is pregnant for the first time is known as a primigravida or gravida 1: a woman who has never been pregnant is known as a gravida 0; similarly, the terms para 0, para 1 and so on are used for the number of times a woman has given birth. In many societies' medical and legal definitions, human pregnancy is somewhat arbitrarily divided into three trimester periods, as a means to simplify reference to the different stages of fetal development. The first trimester period carries the highest risk of miscarriage (natural death of embryo or fetus). During the second trimester the development of the fetus can start to be monitored and diagnosed. The third trimester marks the beginning of viability, which means the fetus might survive if an early birth occurs.
