> Christianity arguably disagrees with you - see the tale of Onan
"Be fruitful and multiply" is Genesis 1:28.
Onan is, per Jermone and canonical discussions, about spilling seed unnecessarily, but is more about not raping your sister-in-law and betraying dead family than it is about having many children. Nothing in there about the sacredness of babies or anything.
Onan's brother died and by tradition Onan entered into a Levirate marriage with his dead brother's wife, Tamar, to continue the brother's line. If Onan fathered a child by Tamar the child would inherit all of the dead brother's possessions and rights; if there were no sons Onan would inherit everything. So Onan pulls out, meaning he gets to bang the widow, and still gets to keep everything -- which is pretty sleazy.
God isn't really a fan of this, and punishes him accordingly.