CHD-2220 Lecture Notes - Lecture 3: Pregnancy Test, Combined Oral Contraceptive Pill, Fetus

• School: FSU
• Department: Family and Child Sciences
• Course: CHD-2220
• Professor: D R.M U R R A Y K R A N T Z

Document Summary

Ovulation is stimulated by a peak in lh. Fsh ripens eggs in first phase of cycle. Pregnancy test is most accurate one week after conception. More reliable the longer you leave it following conception. 266 days (conception birth: pre-term birth = 37 weeks or earlier, 26 weeks = 2 pounds (strong risk of fatality, 2 weeks past due date = post mature. Placenta begins to degenerate (damaging to baby) Broken down into sub-stages: usually 3 trimesters of 3 months each approx. First stage = 2 weeks post conception: single fertilized egg eventually divides by mitosis (proliferation of cells, 10 days post-conception = blastocyst (hollow ball of cells) Implantation = 1 week post-conception: blastocyst begins to differentiate and form different layers of cells. Will eventually form various organ systems: 2 weeks post-conception = blastocyst flattens out and rolls over on itself and forms neural tube of the zygote (brain and spinal cord)