Why does ultrasound examination lead to embryonic arrest?? What should I do???

Patient's question:

My wife is about 50 days pregnant. During this period, she had a blood test, and the HCG levels were doubling, but the progesterone level remained consistently between 11-12. The doctor said there was no need for pregnancy preservation. The last ultrasound examination showed: fetal arrest. The doctor recommended an abortion. She has a history of pelvic inflammatory disease and has a discharge of two plus. I would like to ask why fetal arrest occurred. Is it directly caused by progesterone or by sperm quality? We are not young anymore, and we want to have a baby. If we get pregnant again, how can we prevent this from happening? I am very worried. Thank you for your expertise. Wishing you all health.

Doctor's answer:

Medical Analysis: Hello, this is likely due to low progesterone causing the fertilized egg to fail to develop, which is related to the function of the corpus luteum in the pregnant woman.
Recommendations: If you want to get pregnant again, you can take some menstrual regulation and fertility pills to regulate your body before pregnancy. After getting pregnant, it's important to detect pregnancy early and have a blood test to check progesterone for timely pregnancy preservation. You need to start preserving the pregnancy around the 30th day, and it is usually possible to save it. However, since you only checked at the 50th day, it is too late, and there is no need for pregnancy preservation.

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