Human reproduction

Abortion is the termination of a pregnancy by removal or expulsion of an embryo or fetus. The unmodified word abortion generally refers to induced abortion, or deliberate actions to end a pregnancy. Abortion occurring without intervention is known as spontaneous abortion or "miscarriage", and occurs in roughly 30–40% of all pregnancies. Common reasons for inducing an abortion are birth-timing and limiting family size. Other reasons include maternal health, an inability to afford a child, domestic violence, lack of support, feelings of being too young, wishing to complete an education or advanc

Sex, more formally known as sexual intercourse, coitus, or copulation, is an intimate social activity typically involving the insertion of the erect male penis inside the female vagina and followed by thrusting motions for erotic pleasure, biological reproduction, or both. This specific type of sex is also known as vaginal intercourse. However, other forms of penetrative sexual intercourse also exist, including anal sex, oral sex, fingering and penetration by use of a dildo, and vibrators. The desire for these activities is grounded in natural human instinct and they involve physical intimacy between two or more people, usually enacted by humans solely for physical-emotional pleasure, sometimes contributing to human bonding.

Ovulation is an important part of the menstrual cycle in female vertebrates where the egg cells are released from the ovaries as part of the ovarian cycle. In female humans ovulation typically occurs near the midpoint in the menstrual cycle and after the follicular phase. Ovulation is stimulated by an increase in luteinizing hormone (LH). The ovarian follicles rupture and release the secondary oocyte ovarian cells.

complex of symptoms caused by elevated androgen levels in women

methods used to achieve pregnancy by artificial or partially artificial means

stage of pregnancy at which the already fertilized egg adheres to the wall of the uterus

thumb|Childlessness at the age of 30 Childlessness is the state of not having children. Childlessness may have personal, social or political significance.

procreative biological processes of humanity

Fecundity is a descriptor of productivity that can be defined in multiple ways; including the capability to produce offspring. It may refer to the level of fertility of human, animal, and organic life as measured by the number of gametes (eggs), seed set, or asexual propagules. Additionally, it is the potential for reproduction of a recorded population as opposed to a sole organism.

human embryo which has been genetically modified

the process of development of sex differences in humans

layer of connective tissue

special form of in vitro fertilisation

aspect of history

chemical compound

philosophical and legal idea

late-term abortion

Subset of human trafficking

idea in anthropology

sperms and eggs are introduced in the fallopian tube for natural fertilization.

assisted reproductive technology procedure

using surgery in the field of reproductive medicine

Theoretical biological reproduction by LGBT people

gender preference issue

fraud in fertility medicine