What is oogenesis? Oogenesis is a type of gametogenesis. It is the process of producing female gametes, once sex determination of the embryo has occurred. The presence of the SRY gene on the Y chromosome leads to male gonad formation and spermatogenesis, while female gonad development is the âdefault stateâ.
One type of twist or kink is called a small bowel obstruction. This usually happens after a patient has had an abdominal operation like appendectomy, hysterectomy, or colon removal which leads to scar tissue or adhesions developing in the abdomen. The intestines can be come twisted, kinked, or obstructed around this scar tissue. This condition, called a small bowel obstruction, may require surgery for treatment in 20% of patients. Small bowel obstruction can also occur as the result of a hernia. Another type of intestinal twist is called a volvulus. This usually occurs in the colon, where a segment of the colon rotates 180 degrees like a roller coaster loop. This causes a blockage of the colon and may pinch off the blood supply to the colon.
Scar tissue on the uterus and nearby organs. Bands of scar-like tissue (adhesions) develop after each abdominal surgery, though the extent of their formation after a C-section varies. Dense adhesions can make a C-section more difficult, prolonging the time to delivery. Bladder and bowel injuries. Bladder injuries, which are possible but uncommon with initial C-sections, are more likely with repeat C-sections. The increased risk is likely due to adhesions that developed after a previous C-section, binding the bladder to the uterus. Adhesions can also cause small bowel obstruction.