Pregnancy is an unchanging topic, how many lives appear in our world every day, full of joy. Many expectant mothers are very happy when they are pregnant. Various examinations are also required during pregnancy. These tests can help us understand the growth of the fetus and enable expectant mothers to better take care of it. So, how many days during pregnancy should progesterone be checked?
How many days pregnant is the best time to check progesterone
After being diagnosed with pregnancy, you can go for a check-up, which usually takes 35-50 days. Reference value: As the units converted by different hospitals are currently different, if the unit of the reference value on the laboratory test report you receive is ng/ml, then X3.18 should be converted to nmol/L. Everyone should pay attention to the unit. Here are the reference values in nmol/L:
Pregnancy at 7 weeks: 52.7-100.1 nmol/L
Pregnancy at 8 weeks: 64.6-113.8 nmol/L
9-12 weeks of pregnancy: 78-159.2 nmol/L
13-16 weeks of pregnancy: 98.3-185.7 nmol/L
17-20 weeks of pregnancy: 153.8-241.2 nmol/L
21-24 weeks of pregnancy: 234.6-457.4 nmol/L
25-34 weeks of pregnancy: 403.4-626.2 nmol/L
After 35 weeks of pregnancy: 483.6-776.8 nmol/L
HCG reference value:
Pregnancy: 3-4 weeks: 9-130 (mIU/ml)
4-5 weeks of pregnancy: 75-2600
5-6 weeks of pregnancy: 850-208003
6-7 weeks of pregnancy: 4000-100200
Pregnancy 7-12 weeks: 11500-289000
12-16 weeks of pregnancy: 18300-137000
16-29 weeks of pregnancy: 1400-53000
Pregnancy 29-41 weeks: 940-60000
The function of progesterone
(1) Immune protection
Progesterone has an immune protective effect and suppresses immune responses. There is a study that implants certain tumor cells into the uterus of animals. Only in animals injected with progesterone, the cells are not rejected and implant into the uterine wall, indicating that progesterone can inhibit immune responses. This also indicates that when women have a normal pregnancy, an increase in progesterone can prevent the embryo from being rejected by the mother and maintain the pregnancy. When progesterone is insufficient, it may cause the embryo to be rejected by the mother and result in miscarriage.
(2) Embryo implantation
During ovulation, under the action of progesterone secreted by the corpus luteum, the endometrium transitions from the proliferative phase to the secretory phase, making it receptive to embryo implantation. Decidual cells are transformed from endometrial stromal cells and contain glycogen granules that provide nutrients to the blastocyst. Progesterone can induce endometrial stromal decidualization and regulate the expression of various implantation related factors in the form of autocrine or paracrine secretion. So, progesterone is necessary to maintain the decidual response.
The examination of progesterone can be conducted after confirming pregnancy, and expectant mothers also need to understand the normal values at each stage in order to detect problems in a timely manner during the examination. There are also many functions of progesterone, and expectant mothers may have a better understanding of its importance after learning about it. I hope every expectant mother is healthy.
