through the placenta and umbilical
cord
Genetic Material (DNA).
"High concentrations may reduce the amount of oxygen available for breathing, especially in confined spaces. Hypoxia (inadequate oxygen) during pregnancy may have adverse effects on the developing fetus. Exposure during pregnancy to high concentrations of carbon monoxide or carbon dioxide, which are produced during the combustion of hydrocarbon gases, can also cause harm to the developing fetus." Propane Material Safety Data Sheet.
crossing over
Crossing-over
After ontogeny there is maturity.
Smoking marijuana during pregnancy will increase the child's risk for developing a drug problem later in life as well as decreasing the child's motivation to succeed in life.
The spandex lycra material panties seem to be the most comfortable and yet still sexy to wear during pregnancy.
The first two months of pregnancy are the most important months of the pregnancy. The heart, brain, and other vital organs begin developing.
Crossing over during meiosis results in to exchange of genetic material between members of a homologous pair of chromosomes.
Parathyroid scans are not recommended for pregnant women because of the potential harm to the developing fetus.
differentiation. it occurs during one of the early stages of pregnancy.
During meiosis, chromosome exchange occurs at the chiasmata, which are points of crossing over between non-sister chromatids. The exchange involves the exchange of genetic material between homologous chromosomes, not specifically at the centromere or telomere regions.