A woman is currently in her fifth month of pregnancy. Which of the following options correctly identifies a developmental milestone of the foetus occurring at this stage, along with the primary endocrine structure secreting progestogens to maintain her pregnancy?

Step-by-step solution

The fifth month of human pregnancy corresponds to approximately 20 weeks of gestation. According to NCERT, the first movements of the foetus and the appearance of hair on the head are usually observed during the fifth month. During the initial stages of pregnancy, the corpus luteum secretes progestogens to maintain the endometrium. However, as pregnancy progresses beyond the first trimester, the corpus luteum regresses and the placenta takes over as the primary endocrine tissue secreting progestogens (along with hC