synÂ·theÂ·size (sÄ­nâ²thÄ­-sÄ«zâ²) v. synÂ·theÂ·sized, synÂ·theÂ·sizÂ·ing, synÂ·theÂ·sizÂ·es v.tr. 1. To combine so as to form a new, complex product: His works synthesize photography, painting and linguistic devices (Paul Taylor). 2. To form or produce by chemical synthesis. 3. To produce (sound or music) by means of a synthesizer. v.intr. To form a synthesis.
The cause of preterm birth is often not known. Risk factors include diabetes, high blood pressure, being pregnant with more than one baby, being either obese or underweight, a number of vaginal infections, tobacco smoking, and psychological stress, among others.
The placenta is a structure that develops in the uterus during pregnancy. Placental abruption occurs when the placenta separates from the inner wall of the uterus before birth. Placental abruption can deprive the baby of oxygen and nutrients and cause heavy bleeding in the mother. In some cases, early delivery is needed.