Patient's question:
I came for my period on the 15th of last month, and today on the 22nd of this month, my urine test was positive. A detailed ultrasound examination showed no gestational sac, but a free anechoic area was observed at the posterior uterus, measuring 18mm deep. The doctor concluded that there is fluid accumulation in the pelvis.I would like to ask, how is a free anechoic area considered large? Is 18mm deep considered large?
Additionally, how is pregnancy duration calculated? Online, everyone except the doctor calculates it from today, subtracting the day of my last period. Today, the doctor said I am 37 days pregnant and mentioned that it is abnormal not to see a gestational sac. However, in reality, my husband and I stopped using contraception only about 10-15 days ago. Shouldn’t it be considered about 10-15 days of pregnancy?
Besides the pelvic fluid accumulation, what is the cause? Is it serious? I haven’t felt any discomfort?
Doctor's answer:
How many days of pregnancy are generally calculated starting from the first day of the last menstrual period, not from the day of sexual intercourse. If you have been amenorrheic for 37 days and have not seen an intrauterine gestational sac, the possibility of ectopic pregnancy cannot be ruled out. It is recommended to recheck blood HCG and ultrasound every 2-3 days. If the blood HCG continues to slowly decline and a careful ultrasound examination still does not reveal an intrauterine gestational sac, the possibility of ectopic pregnancy is relatively high. If an ectopic pregnancy mass is detected, it can be definitively diagnosed. As for pelvic effusion, it may be caused by pelvic inflammatory disease.