The Process of Conception

March 12, 2017By

woman-163617_1280The Biology
Vaginal sex is the insertion of a male’s penis into a female’s vagina. This process can lead to pregnancy, with the male’s sperm fertilizing the female’s egg during ovulation. If the egg implants in the uterus, the female will become pregnant.

Every month, a woman’s body prepares for pregnancy. First, an egg grows and is released from one of the ovaries and travels up one of the fallopian tubes, a process known as ovulation. The egg waits for the sperm. Meanwhile, the uterus creates a tissue lining around itself where the egg and sperm, if they meet and fuse, will attach. A female cannot get pregnant without the presence of sperm. If no sperm enters the egg, the unfertilized egg and the uterine lining shed, which is when females have their period. After this period, the cycle begins again by releasing another egg and rebuilding the uterus lining.

If sperm does enter the egg during sexual intercourse, it will penetrate the egg. Pregnancy can only happen during a woman’s ovulation period in her menstrual cycle, more specifically, when the egg is in the fallopian tube (typically two weeks before your next menstrual cycle). After fertilization, the cells begin to multiply and the zygote travels to the uterus. About 8-10 days later, the zygote embeds in the uterine wall. The zygote is referred to as an embryo, and periods will cease for the duration of the pregnancy.

The baby’s gender is solely determined by the sperm. All of the eggs will carry the X chromosome. As for the sperm, 50% carry the X chromosome and other 50% carry a Y chromosome. When the egg and the sperm come together, each will bring a sex chromosome. The egg will always bring the X. What the sperm brings will determine the baby’s gender. Specifically, if the sperm bring a Y then the baby will be XY and become a boy and if the sperm brings an X then the baby will be XX and become a girl.

A full term pregnancy is 40 weeks, and the weeks are grouped into three trimesters. A baby develops during this time and key components are the placenta, which is an organ that develops in the uterus and provides and removes waste for the developing baby. The umbilical cord connects the embryo to the placenta.


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