The correct option is D b, d, c, f
During pregnancy, the levels of hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progestogens, etc. are increased several folds in the maternal blood. Increased production of these hormones is essential for supporting fetal growth, metabolic changes in the mother and maintenance of pregnancy.
LH and FSH increase gradually during the follicular phase in menstrual cycle.