The topic here is money towards yeshivas. We are not here to discuss the struggles of raising children, nor what roles men and women have in their upbringing. If you are arguing you are not having children because of money, say so. There is no need to delve into the work entailed that comes with a newborn.
If the responsibilities of the newborn is your reason, please save us the speech about taking from tzeddaka, as, admittedly, it is not your defense.