The purpose of this study is to determine whether assessing color doppler of corpus luteum and uterine artery is useful in predicting patients who will complete pregnancy. The investigators will add to this the usefulness of serum progesterone and CA125 in prediction.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Viable fetus (According to WHO viable fetus >500 gm or > 20 weeks)
Timeframe: from 20 weeks till 21 weeks gestation