Low progesterone in 35 days of advanced pregnancy first go to the hospital to check the condition of the gestational sac, and then consider whether the treatment of birth control, birth control can be supplemented with progesterone under the guidance of the doctor. Progesterone helps stimulate uterine changes during the reproductive process and increases blood flow to the blood vessels and tissues of the reproductive system, which promotes embryonic development.Low progesterone in the early stages of pregnancy does not support pregnancy, and may cause preterm miscarriage. Low progesterone in 35 days of advanced pregnancy may be caused by luteal insufficiency, it is recommended to go to the hospital to do an ultrasound, blood test HCG, to determine that there is a gestational sac in the uterine cavity, the blood HCG doubles well, to consider the treatment of fertility preservation, under the guidance of the doctor to take progesterone, dydrogesterone tablets, intramuscular injection of progesterone to preserve the fetus treatment. 35 days of pregnancy through ultrasound examination in the uterine cavity can not see the gestational sac, may be a relatively short period of pregnancy, ectopic pregnancy and other reasons, can be observed for another 7 days or so, to determine the ectopic pregnancy there is no need to preserve the fetus, to terminate the pregnancy in time to deal with. The chances of abnormalities will increase after pregnancy at an advanced age, so do your pregnancy checkups regularly and seek medical attention if you have any problems.