[…] physical finding), vaginal mucosa imperforate hymen, hymen imperforated, Hymen, Imperforate, Imperforate hymen, Imperforate hymen (disorder), fusion; hymen, hymen; fusion,
[fpnotebook.com]
Imperforate hymen is an uncommon anomaly of the reproductive tract, occurring in approximately 0.1% of newborn females.
[ncbi.nlm.nih.gov]
Imperforate hymen and hydrocolpos can be diagnosed as early as the second trimester.
[ncbi.nlm.nih.gov]