When a woman is pregnant, the gestational trophoblast cells will secrete and produce the specific HCG hormone, also known as human chorionic gonadotropin. Early pregnancy can be checked with a blood test for blood HCG, and for women with fertility requirements, blood can also be drawn together with progesterone, with the cost of the blood HCG test ranging from$30-$40 and the cost of the progesterone test ranging from$40-$45. It is possible to check just blood HCG alone, or blood HCG and progesterone to get an idea of the growth and development of the embryo. The normal progesterone value after pregnancy is above 30ng/L, HCG hormone will increase with the time of menopause into the phenomenon of doubling every other day, when the HCG is more than 10,000 or more, you can check the ultrasound to see that there is a gestational sac appeared.