Pregnancy and Childbirth

Colostrum is a form of milk produced by the mammary glands in late pregnancy and the few days after delivery in all the mammals. Human colostrum is thick, sticky and yellowish.

Spontaneous miscarriage is the spontaneous end of a pregnancy at a stage where the fetus is incapable of surviving independently. It can happen before the 20^th week of pregnancy.

This period of development starts during the ninth week and lasts until birth. The early body systems and structures formed in the embryonic stage continue to develop. In this stage the neural tube develops into the brain and spinal cord. In this stage all the organs of the fetus predicate their specialised functions.

Quickening is the early signs of the foetus movements during pregnancy. 

A genetic disorder is an illness caused by abnormalities in genes or chromosomes, especially before birth. To know the genetic causes of a variety of such diseases and for performing such tests, one needs fetal cells and these cells are obtained by invasive methods like aminocentesis, etc.

The broad ligament serves as a mesentery for the uterus, ovaries and the uterine tubes. It helps in maintaining the uterus in its position.

The most common site of ectopic implantation is the uterine tube. The growth of the embryo in this site usually causes rupture of the tube and severe hemorrhage in the mother. Abdominally, an ectopic pregnancy often occurs in the rectouterine pouch, an area between the uterus and the rectum.

The reason for maternal mortality rate is short birth interval, i.e. lack of spacing in births.

Humans have a placenta discoidalis (discoid placenta), where chorionic villi are concentrated in one disc-shaped area. Diffusa occurs in horses and whales, cotyledonaria in cows and sheep, and zonaria in carnivores. The discoid structure allows efficient nutrient exchange in a single, compact region.

IgGs are most abundant immunoglobulins (80% of the total Igs) whereas IgEs are the least abundant immunoglobulins (0.1% of the total Igs).

Gestational diabetes mellitus is a diagnosis of diabetes mellitus that applies only to women in whom glucose intolerance develops or is first discovered during pregnancy. Gestational diabetes develops in 2-5% of all pregnant women but disappears when the pregnancy is over.

HIV infection is due to the transmission of the HIV virus, not the antibody. However, the presence of maternal anti-HIV IgG can lead to diagnostic difficulty. It is thus necessary to confirm HIV infection in the newborn by the presence of viral DNA or RNA using a polymerase chain reaction (PCR) method.

Pregnancies that share the placenta and amnion are at the highest risk of adverse outcome because of risk of twin-to-twin transfusion syndrome and cord entanglement.

Persistent fetal lobulation of the adult kidney is a normal anatomical variant where the fetal renal lobulation pattern persists into adulthood. It is not a congenital defect, not caused by obstruction or infection, and does not represent pathology. It represents persistent external lobulations between the renal pyramids and is often incidentally detected on imaging. The kidney functions normally.

Eisenmenger's complex has the highest maternal mortality (30-50%) in pregnancy due to right-to-left shunt with pulmonary hypertension. Pregnancy is contraindicated. Other valvular lesions like mitral stenosis carry risk but are manageable with careful monitoring.