If sexual interaction occurs,God may potentially bless the world with a child, then you raise the child. If done in a petri dish, then a child too is born - and you will have to answer why you did so against His natural intent as well as raising the child.
Rape (rare), love, “accident” - if God gives the child to you, it is a child for the world, a child that He wants. You are not owner of the child, just responsible for raising and loving the child to someday enter heaven - so long as you live.
You go to heaven or hell based on your effort (not your result). If you must give the child up for adoption, that will be considered in the end as a selfless or a selfish reason, a blend perhaps, based on the Truth.
It’s rather straightforward.
You’re created, believe it or not, to give glory to God. Your marriage is to have two join and help one another better give glory to God and get to heaven, though ultimately that is your own responsibility.
When you use birth control, you play God, deciding (you think) when life will be permitted and when it wont. Your job is to love your wife, not pretend you’re Him. You may decide not to have relations or when to have relations, but the resulting creation of love incarnate, life, is God’s realm. Love in the image of God, a life, may be seen as good or bad to man, but is only seen as good to God.
The child will give society an opportunity to experience love - either in enjoying the child, caring for the child (if disabled), even in locking up the child in prison. We show God our capacity for love - or lack thereof - and will be judged by that.
Must Know Facts About the Pill
The effectiveness of birth control pills depends entirely on how they are used. While the stated effectiveness is 96-99% in reality this rate is much lower, around 87%. Poor user habits are the reason for the discrepancy. Taking the Pill at different times of day, missing days or skipping pills all decrease the effectiveness.
From http://www.livestrong.com/article/210679-effectiveness-of-natural-family-planning-methods/
Calendar-Based Methods
With calendar-based methods, women count the days of their monthly cycles to estimate the most likely times for their infertile and fertile phases. As of 2010, the standard days method has largely replaced the oldest calendar-based "rhythm method."
Many women with regular monthly cycles between 26 and 32 days can practice the standard days method. Compared to the rhythm method, it has simpler rules, is easier to follow and thus is far less prone to user error, especially if practiced with a color-coded visual aid, such as CycleBeads. The effectiveness rate for correct and consistent use is over 95 percent and for actual practice 88 percent, compared to 91 percent versus 75 percent, respectively, for calendar rhythm.
The Calandar Method of natural family planning is what is taught by the Catholic Church and is every bit as effective at preventing unwanted pregnancy as the pill, and has none of the side effects that the pill has on womens health.
So, if the couple do not want to have children because of money issues, the good news is that there is an effective method to prevent pregnancy that costs NOTHING.