In women, gonorrhea is a common cause of pelvic inflammatory disease (pid). which of the following is not a symptom of pid? choose the best possible answer.

chronic back pain
chronic pelvic pain
ectopic pregnancy
tubal pregnancy

By 2 weeks after fertilization the morula has implanted into the uterine lining and transforms into a(n) . this time is when the , or the organ that will provide nourishment to the fetus by exchanging nutrients and waste products, begins to develop.