I'd have a difficult time being married to someone who could not accept Humanae Vitae, especially if she felt a need to practice artificial birth control. Besides, go through the Bible; all throughout children are repeatedly described as a blessing. I'm willing to have a relatively large family if God wills it for me. My sister is the greatest gift my parents could have given me, and as I get older, I appreciate her more than ever and wish that they could have given me more siblings. The full document is not really that long, so I encourage you to read this encyclical with an open mind and ask God for the grace to welcome it into your heart.
Read
Humanae Vitae for yourself
One More Soul: Spreading the
truth about the blessings of children and the harms of
contraception
The Billings web site
Couple-to-Couple League
Closing prayer