HOME WEB NEWS IMAGES CLASSIFIEDS YELLOW PAGESPOLLS - SURVEYS WIKI COUNTRIES PHOTOS US UK INDIA
Cities Stocks Weather Movies Coupons Travel Blogs Health Horoscope Maps ASIA EUROPE Classifieds Yellow Pages
 2
|
Ovoviviparous animals develop within eggs that remain within the mother\'s body up until they hatch or are about to hatch. This strategy of birth is known as ovoviviparity. It is similar to vivipary in that the embryo develops within the mother\'s body. Unlike the embryos of viviparous species, ovoviviparous embryos are nourished by the egg yolk rather than by the mother\'s body. However, the mother\'s body does provide gas exchange.
Ovoviviparity is employed by many aquatic life forms such as fish and some sharks, reptiles, and invertebrates. The young of ovoviviparous amphibians are sometimes born as larvae, and undergo metamorphosis outside the body of the mother.
| Human physiology and endocrinology of reproduction | |
|---|---|
| Anatomy and physiology | Reproductive system (male, female) |
| Menstrual/Estrous cycle | Menstruation - Follicular phase - Ovulation - Luteal phase |
| Gametogenesis | Spermatogenesis (spermatogonium, spermatocyte, spermatid, sperm) - Oogenesis (oogonium, oocyte, ootid, ovum) - Germ cell (gonocyte, gamete) |
| Sexuality | Human sexual behavior - Sexual intercourse - Erection - Ejaculation - Orgasm - Insemination - Fertilisation/Fertility - Masturbation - Pregnancy - Postpartum period |
| Lifespan | Prenatal development - Sexual dimorphism - Sexual differentiation - Puberty (Menarche, Adrenarche) - Maternal age/Paternal age - Climacteric (Menopause, Andropause) |
| Eggs | Ovum - Oviposition - Oviparity - Ovoviviparity - Viviparity |
| Reproductive endocrinology | Hypothalamic-pituitary-gonadal axis - Andrology - Hormone |
 | This biology article is a stub. You can help Wikipedia by expanding it. |
This article is licensed under the GNU Free Documentation License. It uses material from Wikipedia
