Maran Rav Chaim zatzal on Parshas Metzorah Rav Yisrael Lifschitz (1782-1860), author of the Tiferes Yisroel commentary on the Mishna, posed the question as to why there is no longer...
Isha ki sazria v'yaldah zachar.. The Ramah writes (YD 265:11) that the Sandek is equated to the Kohain who offers the incense in the Temple, and it is a segulah...