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...

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

which involve alternative methods of fertilization, which do not involve sexual intercourse; the fertilization of the ovum may be achieved by artificial...

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

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...

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...

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

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

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

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

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...

(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...

plants and some algae and fungi, fertilization involves the migration of the sperm nucleus through a fertilization tube (e.g. pollen tube in higher plants)...

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...

Humans (Homo sapiens, meaning 'thinking man' or 'wise man') or modern humans (sometimes Homo sapiens sapiens) are the most common and widespread species...

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...

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

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...

the sperm, encouraging fertilization and nourishing the ovum until it reaches the uterus. If the ovum divides after fertilization, identical twins are produced...

zygote. If no fertilization occurs, menstruation is the process by which the uterine lining is shed as blood, mucus, and tissue. Fertilization usually occurs...

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

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...

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

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";...

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

because an egg is fertilized inside the body, this is in contrast with in vitro fertilisation (IVF). In plants, the fertilization process is referred...

discern when fertilization or implantation occurred. Gestational age is contrasted with fertilization age, which takes the date of fertilization as the start...

sperm can enter the female reproductive tract and fertilize the egg, thus beginning the next stage in human reproduction, pregnancy. The desire for sensual...

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

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...