Week 30 Fat deposits are formed underneath the skin. The digestive tract and lungs are fully matured. The baby is now about 14 inches long. The baby fills up the uterus. Week 38 Full term pregnancy.
Estrogens are strong growth promoters of normal and most cancerous breast tissue.
Most known risk factors for breast cancer are attributable to some form of estrogen overexposure. If the pregnancy is completed, the growth of breast tissues is halted and replaced with milk-producing tissues. Thus, if pregnancy is stopped short by abortion or breast-feeding is not used, the excessive estrogen level in blood shall promote breast tissues to growth abnormally into cancerous cells. Pregnancies which are terminated spontaneously or naturally usually do not pose this problem as they tend to associate with very abnormally low estrogen level. Clinical rats which were forced with abortions were seen to develop more breast cancers dramatically.