Term
|
Definition
| Any chromosome within the body except the sex chromosomes (X and Y ) |
|
|
Term
|
Definition
| A nongenteic factor that can produce malformations of the fetus |
|
|
Term
|
Definition
| Cell or organism containing a set of maternal and a set of paternal chromosomes. In humans the diploid number of chromosomes is 46. |
|
|
Term
|
Definition
| The process in which mature spermatozoa are formed and during which the number of chromosomes is reduced by half. |
|
|
Term
|
Definition
| The process by which eggs are produced. |
|
|
Term
|
Definition
A set of chromosomes containing only one member of each chromosome pair. The sperm and egg are haploid and, in humans, have 23 chromosomes.
|
|
|
Term
|
Definition
The process of combining the male gamete, or "sperm," with the female gamete, or "ovum." The product of this combination is a cell called a zygote.
|
|
|
Term
|
Definition
| The origin and maturation of gametes, which occurs through meiosis |
|
|
Term
|
Definition
| Endometrial tissue that has been structurally and functionally transformed by pregnancy; decidualization' begins at conception's inception and is complete by the end of the first month |
|
|
Term
|
Definition
| Any of three cellular layers, the ectoderm, endoderm, or mesoderm, into which most animal embryos differentiate and from which the organs and tissues of the body develop through further differentiation |
|
|
Term
|
Definition
| The outermost of the two fetal membranes - the amnion is the innermost . which together surround the embryo. The chorion develops villi (vascular fingers) and gives rise to the placenta |
|
|
Term
|
Definition
| The sac formed by the amnion and the chorion and containing fluid and the fetus. Its commonly known as the "bag of waters." |
|
|
Term
|
Definition
| By 21 to 22 weeks after fertilization.This is considered the age of viability because survival outside the womb becomes possible for some fetuses |
|
|
Term
|
Definition
| A specialized disk-shaped organ that connects the fetus to the uterine wall for gas, nutrient, and waste exchanges. Also called the after Birth. |
|
|
Term
|
Definition
| Yellow-white gelatinois material that surronds and protects the vessels of the umbilical cord. |
|
|
Term
|
Definition
Two fetuses that develop from a single divided fertilized ovum.
Identical twins. |
|
|
Term
|
Definition
Fetuses that develop from two fertilized ova.
Fraternal twins |
|
|
