<P> Fertilization usually occurs in the Fallopian tubes and marks the beginning of embryogenesis . The zygote will then divide over enough generations of cells to form a blastocyst, which implants itself in the wall of the uterus . This begins the period of gestation and the embryo will continue to develop until full - term . When the fetus has developed enough to survive outside the uterus, the cervix dilates and contractions of the uterus propel the newborn through the birth canal (the vagina). </P> <P> The female internal reproductive organs are the vagina, uterus, Fallopian tubes, and ovaries . </P> <P> The vagina is a fibromuscular (made up of fibrous and muscular tissue) canal leading from the outside of the body to the cervix of the uterus or womb . It is also referred to as the birth canal in the context of pregnancy . The vagina accommodates the male penis during sexual intercourse . Semen containing spermatazoa is ejaculated from the male at orgasm, into the vagina potentially enabling fertilization of the egg cell (ovum) to take place . </P> <P> The cervix is the neck of the uterus, the lower, narrow portion where it joins with the upper part of the vagina . It is cylindrical or conical in shape and protrudes through the upper anterior vaginal wall . Approximately half its length is visible, the remainder lies above the vagina beyond view . The vagina has a thick layer outside and it is the opening where the fetus emerges during delivery . </P>

The passage that leads to the internal female reproductive organs