R' Moshe writes it clearly in his tshuva that he got the info from Rav Tendler.
It is astonishing to me that the very same people who have no problem disqualify his opinions on Har Habayis, Metzitzah B'peh, clinical death etc. all of a sudden rely on him when it comes to encouraging the mass production of babies.
Plug out life support of your clinically dead bubby, make fun of the Palestinians in front of Al-Aqsa and then we'll talk.
Don't be a hypocrite.
That killed me. Rofl. +1. Btw, there are so many so I'm not sure if it's the same one, but our Rav actually gave us a blanket heter, brought down from Rabbi Tendler, to use BC for the first year of marriage because there are so many cases of divorce now among young frum couples.