Daf Hasavua Nedarim 31 b-Mila On Shabbos

          גדולה מילה שדוחה את השבת

Harav Yosef Sholom Elyashuv zt"l originally held that children born through artificial insemination may not have their Bris done on Shabbos.

In later years he changed his mind and allowed the Bris to be Doche Shabbos on such children.

Harav Ezriel Auerbach shlita explained his Shver as follows:

Based on a Rabbeinu Chananel, artificial insemination is considered Ma'aseh Nissim and therefore would not be  Doche Shabbos.

Since artificial insemination became a very common practice, it is no longer considered Ma'aseh Nissim and is Doche Shabbos.

I was wondering, recently a 60 year old woman gave birth to a boy. What would have happened had she given birth on Shabbos, would it be allowed to perform the Bris on Shabbos. (Ma"aseh Nissim).