Gametogenesis - Ovulation - Menstrual cycle - Estrous cycle Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Human physiology is the science of the mechanical, physical, and biochemical functions of normal humans or human tissues or organs. ... Endocrinology is a branch of medicine dealing with disorders of the endocrine system and its specific secretions called hormones. ... This article or section does not cite its references or sources. ... Reproductive endocrinology (RE) is a medical subspecialty that addresses hormonal functioning as it pertains to reproduction. ... Gametogenesis is the creation of gametes by meiotic division of gametocytes into various gametes. ... Ovulation is the process in the menstrual cycle by which a mature ovarian follicle ruptures and discharges an ovum (also known as an oocyte, female gamete, or casually, an egg) that participates in reproduction. ... Menstrual cycle The menstrual cycle is a recurring cycle of physiological changes in the females of some animal species that is associated with reproductive fertility. ... The estrous cycle (also oestrous cycle; originally derived from Latin oestrus) refers to the recurring physiologic changes that are induced by reproductive hormones in most mammalian placental females. ...

Human sexual behavior - Sexual intercourse - Erection - Ejaculation - Orgasm - Insemination - Fertilisation/Fertility - Pregnancy - Postpartum period This article or section does not cite its references or sources. ... // WorldSex Daily Updated Free Links to Hardcore Sex Pictures, Movies, Free Porn Videos and XXX Live Sex Cams. ... The erection of the penis, clitoris or a nipple is its enlarged and firm state. ... Ejaculation is the ejecting of semen from the penis, and is usually accompanied by orgasm. ... Orgasm is the conclusion of the plateau phase of the sexual response cycle, shared by both men and women. ... Insemination is the introduction of semen into the genital tract of a female. ... A spermatozoon fertilising an ovum Fertilisation or fertilization (also known as conception, fecundation and syngamy), is fusion of gametes to form a new organism of the same species. ... Fertility is the ability of people or animals to produce healthy offspring in abundance, and of the earth to bear fruit. ... The term trimester redirects here. ... This article or section does not cite its references or sources. ...

Prenatal development - Sexual dimorphism - Sexual differentiation - Puberty (Menarche, Adrenarche) Maternal age/Paternal age - Climacteric (Menopause, Andropause) Prenatal development is the process in which an embryo or fetus (or foetus) gestates during pregnancy, from the times of fertilization until birth. ... Female (left) and male Common Pheasant, illustrating the dramatic difference in both color and size between the sexes Sexual dimorphism is the systematic difference in form between individuals of different sex in the same species. ... Sexual differentiation is the process of development of the differences between males and females from an undifferentiated zygote (fertilized egg). ... Puberty refers to the process of physical changes by which a childs body becomes an adult body capable of reproduction. ... Menarche (IPA: ) is the first menstrual period, or first menstrual bleeding. ... Adrenarche refers to a stage of maturation of the cortex of the human adrenal glands. ... Graph showing increased risk of Down Syndrome over time The maternal age effect describes the exponentially increasing risks of chromosomal abnormalities as a prospective mother ages. ... Menopause (also known as the Change of life or climacteric) is a stage of the human female reproductive cycle that occurs as the ovaries stop producing estrogen, causing the reproductive system to gradually shut down. ... Menopause is the physiological cessation of menstrual cycles associated with advancing age in species that experience such cycles. ... Andropause is a medical phenomenon, similar to the female menopause, that can affect men between the ages of 40 and 55. ...

Oviposition - Oviparity - Ovoviviparity - Viviparity An average Whooping Crane egg is 102 mm long, and weighs 208 grams A baby tortoise emerges from a reptile egg. ... Ovoviviparous animals develop within eggs that remain within the mothers body up until they hatch or are about to. ... To meet Wikipedias quality standards and make it easier to understand, this article or section may require cleanup. ...