How does ovulation bleeding happen during pregnancy?

Ovulation period if due to hormone changes, especially estrogen reduction is likely to cause ovulation bleeding, general bleeding volume is not much, duration is not long. Ovulation period bleeding normal will not affect normal ovulation, if there is sexual life during the same pregnancy possibility, need to be checked to be clear. If bleeding continues to increase and does not stop on its own, it may be caused by pregnancy biochemistry, threatened abortion or even ectopic pregnancy after pregnancy. It is necessary to further examine sex hormones 6 items, uterine annex B ultrasound and other specific conditions. If pregnancy is diagnosed, it can also be confirmed by B ultrasound whether it is intrauterine pregnancy and understand specific changes such as progesterone.