35 days pregnant with brown blood without a gestational sac may be caused by preeclampsia, ectopic pregnancy and other reasons.
1. Pre-eclampsia: can be manifested as a small amount of vaginal bleeding, can be brown, can also be accompanied by paroxysmal abdominal pain, at this time may also be due to the long menstrual cycle, a short period of time of conception, ultrasound can not be seen in the uterine cavity of the gestational sac, but through the blood HCG (human chorionic gonadotropin), progesterone test can assist in the diagnosis.
2. Ectopic pregnancy: can also be manifested as vaginal flow of brown blood, accompanied by a side of the lower abdomen pain, 35 days pregnant ultrasound did not see the gestational sac, you need to carefully check the bilateral adnexa, but also combined with the blood HCG value to assist in the diagnosis.
Clinically, when the 35 days of pregnancy brown blood flow without a gestational sac, you need to identify the cause under the guidance of the doctor, and actively deal with.