Presentation on theme: "Prenatal Care and Delivery"— Presentation transcript:
1 Prenatal Care and Delivery Ms. Kehoe9th Grade Health
2 Fertilization Process Foreplay hugging, kissing, caressing to get the personsexually aroused - the male gets an erection and thefemale vagina lengthens, widens & moistens, Skene'sGlands & Bartholin's GlandsEjaculation: when the man reaches orgasm heejaculates up to 500 million sperm inside the woman, usuallyaround the cervix.Within hours many sperm make their way into the woman’sbody with only a few hundred make their way into thefallopian tubes.The female does not have an ejaculation, she mayexperience orgasm but not necessarily at the same time asthe male. She does not release an egg cell when she has anorgasm but she may become moist.If no egg is present in the fallopian tubes the sperm will die in a few days.If an egg is present in the fallopian tubes fertilization may take place.
8 The Two Nuclei Combine- 23 chromosomes from the male and23 chromosomes from the womanCombine to form 23 pair or 46 chromosomes.
9 ChromosomesAre thread-like structures in the nucleus of the cell that are made up of genes,Carries of hereditary traits,That determine which traits we inherit from out parents
10 Sex of the Child Egg has a X chromosome pattern gene Sperm has a X or Y chromosome pattern geneXX chromosome pattern will be a girlXY chromosome pattern will be a boyCurrent theory is the sperm determines the sex of the child
15 ..until a hollow ball of cells is formed (blastula)
16 Fraternal Twins: 2 eggs are released and fertilized Fraternal Twins: 2 eggs are released and fertilized. Identical Twins: 1 egg & 1 sperm divide into two separate morula.
17 Once the blastula is implanted in the uterus (1 to 2 weeks) it is called an embryo.
18 Development of a HumanWithin the first 36 hours the fertilized egg (zygote) cleaves (divides) forming two identical connected cells, 4 cells, 8 cells, 16 cells, until a hollow ball of cells is formed (blastula). Once the blastula is implanted in the uterus (1 to 2 weeks) it is called an embryo. This cleaving process will continue for the next 9 months.
24 Placenta:Network of blood vessels and other tissues which is attached to the wall of the uterus.It serves as transition place for all nourishment & waste.The blood of the mother and the fetus never mix.
25 Placenta Cont.:The blood vessels grow side by side and are not directly connected.Blood type of the fetus can be different from that of the mother.
27 Amnionic Sac:Fluid filled membrane that surrounds the growing embryo and fetus.Called the bag of water.Functions: controls temperature, provides room to grow and move, and protects the fetus from injury.