Читать книгу You: Having a Baby: The Owner’s Manual to a Happy and Healthy Pregnancy - Michael Roizen F. - Страница 31

The purpose of an orgasm isn’t solely to make you feel good or provide gossip fodder for the neighbors. The biological purpose is to better the odds that this union between sperm and egg takes place.

On the woman’s side, the mucous membranes that line the vaginal walls release fluids during intercourse so that the penis can slide with just the right amount of friction. As intensity and sensations build, the woman’s brain tells the vagina and nearby muscles to contract. That contraction brings the penis in deeper. Why does that matter? It increases the chance of his sperm getting closer to the target. During an orgasm, the cervix, located at the top of the vagina, dips down like an anteater and sucks semen up into the cervix (the cervix is a passageway connecting the top of the vagina and bottom of the uterus). The sperm is trapped in the cervical mucus

Figure 1.1 Tube Ride In the Fallopian tube, an egg has about twenty-four hours in which it may be fertilized. Once the sperm does so, the fragile combo, the blastocyst, multiplies its cells and must implant in the uterine wall to endure the 280-day pregnancy. Even if you try to summit Everest, this is the most dangerous journey you will ever take.