As for the C-section question, I asked that to a Rav, as my oldest is a boy who was born via c-section. I was told that all the halachos are the same except for pidyon haben
The Mechaber paskens in Choshen Mishpat ???, ? that ???? ???? ???? ????? ????? ???? ?????? ?????? ??? ??? ???? ????? ????? ?? ???? ????? ???? ???? ???.
As far as Ta’anis B’chorim the Shaarei Teshuva in Orach Chaim ??, ? is ????? whether the Yotzei Dofen has to fast.
See here: http://www.hebrewbooks.org/pagefeed/hebrewbooks_org_28075_28.pdf
[??”? ??’ ?”? ??”?] ???? ??? ???? ???????. (?) ????”? ?????? ??”? [???? ???? ???? ???? ??”? ?”? ?????? ???? ??”?] ???? ????? ???????. (?) ????”? ??????? ????”? [??”? ?????? ??????? ??? ?’ ??’ ??”?] ???? ????? ??? ??? ??? ???? ???????, ??? ?????? ?????? ???? ???? ???’ ?????? ???????
The comment of Health above should not have been said even as a joke. It is reminiscent of “Lama Zeh Li B’chorah” said by Eisav – “Vayivez Eisav es Habechora”.