Final answer:
To induce labor, a synthetic form of the hormone oxytocin, known as pitocin, is used to stimulate uterine contractions for childbirth.
Step-by-step explanation:
The synthetic form of the hormone given to induce labor is oxytocin. Oxytocin is primarily responsible for the contractions during labor. In cases where labor needs to be induced, a pharmaceutical version of oxytocin, known as pitocin, is administered through an intravenous drip. This induces the uterine contractions necessary for childbirth. Estrogen plays a role in preparing for labor by causing receptors on the uterine wall to develop and bind oxytocin, while the peptide-derived hormone oxytocin stimulates uterine contractions and the dilation of the cervix, which increases as labor progresses due to a positive feedback mechanism involving prostaglandins.
The correct answer to the question 'A synthetic form of which type of hormone is given to induce labor?' is option 5) oxytocin.