RUNNGING HEAD: The Prenatal Period
The Prenatal Period: 3 Phases and Drugs
Introduction to Psychology
The Prenatal Period last about 9 months and consists of three different levels. The 1st stage is usually Germinal after that Embryonic and then the fetal stage. The infant goes through numerous developmental improvements during the prenatal period. Each stage gives new innovations to a wonderful bundle of life we all call our baby.
After ovulating is the release of an ovum or egg from a woman's ovarian follicle. During each menstrual cycle, several ovarian follicles continue to mature and develop although usually just one follicle develops fully. While the other hair follicles recede, the dominant hair foillicle produces an egg that will be introduced and can be fertilized. The egg is chosen by among the fallopian tubes and begins to travel towards the uterus; this is when fertilization happens. Fertilization must take place within the 12-24 hour lifespan from the egg after ovulating or the egg begins to degenerate and is not anymore capable to be fertilized. Usually only a single ovum can be released during ovulation. On the other hand if two separate ova are unveiled and fertilized the result can be fraternal mixed twins. It could be two brothers, two sisters, or possibly a brother and sister. They can be no more genetically alike than any other two children from the same parents since they come from two independent eggs. Identical twins may result in the event one ovum is introduced and separated into two parts. Identical mixed twins genes happen to be almost indistinguishable. After ovulation the first stage of the prenatal period starts, called the germinal stage which begins at pregnancy and last through the second week of pregnancy. Regarding 2, 500 sperm will reach the uterus as well as the fallopian conduit. One of the sperm must affix itself towards the ovum and penetrate its outer surface. The fertilized ovum, which can be now called the zygote, will travelling down the fallopian tube until it reaches the uterus. It attaches...