How long should I wait after my period to have an ultrasound examination?

Patient's question:

Hello! I would like to ask if it is possible to have an ultrasound examination after 50 days of missed menstruation? If an ultrasound is performed, can it determine whether the fetus is healthy? Can the gender be determined at this time? Thank you

Doctor's answer:

Generally, a missed period of 15-20 days, which is a 45-50-day delay in menstruation, is more likely to show a gestational sac during an ultrasound examination. You are currently 36 days post-menstruation, and an ultrasound may not yet reveal a gestational sac. Please wait another 2 weeks before undergoing another ultrasound examination.
1. Follow the standards of pregnancy to develop good living and rest habits.
2. Avoid contact with small animals, pesticides, and other harmful substances; reduce exposure to radiation-emitting electronic products such as TVs, computers, and mobile phones; quit smoking and drinking alcohol.
3. Supplement nutrition, increase rest, avoid strenuous exercise and fatigue, and prohibit sexual activity.