Question

during labor, certain hormones are released that cause the contraction of the uterus in order to push the baby out. when those hormones are sensed by the glands of the endocrine system, they secrete more of that hormone which keeps labor going until the baby is born.

Explanation:

In positive feedback, a change leads to an even greater change in the same direction. Here, the release of hormones causing uterine contractions (a change) leads to more hormone secretion (an even greater change in the same direction - more contraction - until the baby is born). In negative feedback, a change would trigger a response to reverse that change. But this is not the case here as the process is amplified until the end - goal (birth) is achieved.

Answer:

positive