Pre-Natal Development

2. these are drugs that include nicotine, caffeine, and illegal drugs such as marijuana, cocaine, and heroine
4. also called puseg and it contains two arteries and one vein that connects the body to the placenta
6. the process of organ formation during the first two months of pre-natal development
7. is what causes birth defects
9. combined sperm and egg
11. the middle layer of the cell and later on develops into circulatory, skeletal, muscular, excretory, and reproductive organs
13. this is the stage where human life begins
15. is a bag or an envelope that contains a clear fluid in which the developing embryo floats
16. this is supposed to be the safest of all places for human development
17. this period lasts from about two months after conception until nine months when the infant is born
19. also called German measles and is one of the environmental factors which could later on manifest its effects on the children through malformations, mental retardation, blindness, deafness, and heart problems
21. the field that investigates the causes of congenital (inborn) defects

1. this is the result of heavy drinking by pregnant women
3. under this category, diet pills, aspirin, and coffee are listed and is found to be one of the hazards to pre-natal development
5. is linked to higher chances of chromosomal abilities if the father is exposed to it for long hours
8. the period that occurs 2-8 weeks after conception
10. also called kadkadua and is a life support system that consists of a disk-shaped of tissues in which small blood vessels from the mother and the offspring intertwined but not joined
12. the first 2 weeks period after conception
14. develop into nervous system and sensory organs as well as the skin parts
18. pre-natal development is divided into ____ parts
20. is a procedure to end a pregnancy and it uses medicine or surgery to remove the embryo or fetus and placenta from the uterus.