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| A thin membrane that completely surrounds the embryo and contains a protective fluid in which the embryo is immersed. Also called the amnion |
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| In developmental biology, cellular differentiation is the process by which a less specialized cell becomes a more specialized cell type. |
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| An embryo is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination. |
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| Estrogens, oestrogens, or œstrogens, are a group of compounds named for their importance in the estrous cycle of humans and other animals, and functioning |
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| Semen is an organic fluid, also known as seminal fluid, that may contain spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or female |
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| Either of a pair of slender ducts through which ova pass from the ovaries to the uterus in the female reproductive system of humans and higher mammals. |
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| Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the uterine tube |
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A fetus is a developing mammal or other viviparous vertebrate after the embryonic stage and before birth. |
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A gamete is a cell that fuses with another cell during fertilization (conception) in organisms that reproduce sexually. In species that produce two morphologically distinct types of gametes, and in which each individual... |
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| Menstruation is the shedding of the uterine lining (endometrium). It occurs on a regular basis in reproductive-age females of certain mammal species. |
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| seminal vesicles or vesicular glands are a pair of simple tubular glands posteroinferior to the urinary bladder of male mammals. |
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| The usually paired female or hermaphroditic reproductive organ that produces ova and, in vertebrates, estrogen and progesterone.
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A resource for those who are pregnant. Learn how to recognize the early signs of labor, and how you know you are experiencing labor symptoms. |
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| a haploid female reproductive cell or gamete. Both animals and embryophytes have ova. The term ovule is used for the young ovum of an animal, as well as the plant structure |
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| The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, |
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| Progesterone also known as P4 is a C-21 steroid hormone involved in the female menstrual cycle, pregnancy and embryogenesis of humans and other species. Progesterone belongs to a class |
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A somatic cell (diploid) is any biological cell forming the body of an organism; that is, in a multicellular organism, any cell other than a gamete, germ cell, gametocyte or undifferentiated stem cell. By contrast, gametes are cells that fuse during sexual reproduction, for organisms that reproduce sexually;... |
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Recombination may refer to: Genetic recombination, the process by which genetic material is broken and joined to other genetic material; Carrier generation and recombination ... |
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Testosterone is a steroid hormone from the androgen group and is found in mammals, reptiles, birds, and other vertebrates. In mammals, testosterone is primarily secreted in the testes... |
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Part of the male reproductive system. The male gonads, testes, or testicles, begin their development high in the abdominal cavity, near the kidneys. |
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The uterus is a hollow muscular organ located in the female pelvis between the bladder and rectum. The ovaries produce the eggs that travel through the fallopian tubes. |
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| he cell formed by the union of two gametes, especially a fertilized ovum before cleavage. The organism that develops from a zygote. |
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| The flexible cordlike structure connecting a fetus at the abdomen with the placenta and containing two umbilical arteries and one vein that transport nourishment to the fetus |
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