What is Hysteroscopy is used in all EXCEPT: and explain in detail?
Hysteroscopy is used undoubtedly in :
• Uterine synechiae i.e. Ashermann syndrome - Hysteroscopy is the gold standard technique for diagnosing uterine synechiae (Ashermann syndrome) as well as managing it.
• Abnormal vaginal bleeding hysteroscopy has nearly replaced standard D and C for the management of abnormal uterine bleeding as it allows for the direct visualization of any uterine abnormality as well as simultaneously it can treat them.
• In case of Infertility - “Endoscopic evaluation of the intrauterine cavity is the primary method for defining intrauterine abnormalities (leading to infertility)”. 
• In case of recurrent abortions also hysteroscopy is useful
“Hysteroscopy forms an integral part of the procedures done to evaluate the cause of recurrent pregnancy loss.”
But hysteroscopy is not useful in recurrent still births.