uterus. In vitro fertilization (IVF) is a process by which egg cells are fertilized by sperm outside the womb, in vitro. Fertilization was not understood...

Human reproduction is sexual reproduction that results in human fertilization to produce a human offspring. It typically involves sexual intercourse between...

Fertilisation or fertilization (see spelling differences), also known as generative fertilisation, syngamy and impregnation, is the fusion of gametes...

The Human Fertilisation and Embryology Authority (HFEA) is an executive non-departmental public body of the Department of Health and Social Care in the...

ζυγοῦν (zygoun) 'to join, to yoke') is a eukaryotic cell formed by a fertilization event between two gametes. The zygote's genome is a combination of the...

Development of the human body is the process of growth to maturity. The process begins with fertilization, where an egg released from the ovary of a female...

fallopian tubes for fertilization of the ovum. Only one sperm is required to fertilize the ovum. Upon successful fertilization, the fertilized ovum, or zygote...

fertilization. In some protists, fertilization also involves sperm nuclei, rather than cells, migrating toward the egg cell through a fertilization tube...

Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body. Internal fertilization, unlike its counterpart...

parenthood project during in vitro fertilization and after discontinuation of unsuccessful in vitro fertilization". Fertility and Sterility. 92 (1): 149–156...

last menses, which on average is fertilization age plus two weeks. In mammals, pregnancy begins when a zygote (fertilized ovum) implants in the female's...

old. 1–7 days from fertilization. Fertilization of the ovum to form a new human organism, the human zygote. (day 1 of fertilization) The zygote undergoes...

(gámos) 'marriage') is a haploid cell that fuses with another haploid cell during fertilization in organisms that reproduce sexually. Gametes are an organism's reproductive...

terms, the development of the human body entails growth from a one-celled zygote to an adult human being. Fertilization occurs when the sperm cell successfully...

after fertilization differ in that they carry an X-chromosome, while sperm cells that give rise to male (XY) offspring carry a Y-chromosome. A human sperm...

body. They are fertilized by male sperm either inside the female body (as in birds), or outside (as in many fish). After fertilization, an embryo develops...

Humans (Homo sapiens, meaning "thinking man") or modern humans are the most common and widespread species of primate, and the last surviving species of...

uterus, a single sperm cell can enter and merge with it, fertilizing it into a zygote. Fertilization usually occurs in the fallopian tubes and marks the beginning...

nine months. Counting by fertilization age, the length is about 38 weeks. Pregnancy is "the presence of an implanted human embryo or fetus in the uterus";...

pellucida, which the sperm must penetrate to fertilize the egg. Once viewed simply as an impediment to fertilization, recent research indicates the zona pellucida...

kisses Human anus Human bonding Human female sexuality Human fertilization Human gonad Human male sexuality Human penis Human population control Human reproduction...

the species, spermatozoa can fertilize ova externally or internally. In external fertilization, the spermatozoa fertilize the ova directly, outside of...

the urinary and reproductive organs. Sexual identity is determined at fertilization when the genetic sex of the zygote has been initialized by a sperm cell...

aspect of mating. Many aquatic animals use external fertilization, whereas internal fertilization may have developed from a need to maintain gametes in...

Aquatic arthropods may breed by external fertilization, as for example horseshoe crabs do, or by internal fertilization, where the ova remain in the female's...

hermaphroditic species exhibit some degree of self-fertilization. The distribution of self-fertilization rates among animals is similar to that of plants...

The CO2 fertilization effect or carbon fertilization effect causes an increased rate of photosynthesis while limiting leaf transpiration in plants. Both...

with pure human embryonic stem cell lines. To assess the viability of human sperm for in vitro fertilization Somatic cell hybrids between humans and hamsters...

and mating types. The original form of sex was external fertilization. Internal fertilization, or sex as we know it, evolved later and became dominant...

cervix into the uterus or fallopian tubes for fertilization of the ovum. Upon successful fertilization and implantation, gestation of the fetus then occurs...