I would like to ask a question here. There are many chemical pregnancies even without any birth control. In fact it is quite common for the fertilized egg not to implant. It happened to me too

If the conception process is so inefficient and quite easily goes down the drain how can we consider it to be a murder to prevent implantation? Then it appears that inefficient implantation is waste of life on God’s part…sorry I am a biologist and I used to do research on mouse oocytes. God created design of life and to me it seems that biology has its own way. We are gifted with mind and free will and therefore we primarily should seek relationship with God than to literally listen to every interpretation of scripture by the Church.
Of course Church wants Catholics to multiply so that they can govern us as their obedient sheep. Completely understandable.
Well, as a biologist, you’re no doubt aware that the “reproductive system” is named “reproductive” for a reason. It is not the “entertainment system,” as some seem to think.
All of the physiology of the reproductive system has a singular goal in mind, biologically speaking, and that is procreation. Humans are created with a built-in system for procreation, and when it is used, it is intended by our Creator for procreation. In philosophical terms, the “objective” or “goal” of the sexual act, as intended by our physiology, is procreation. When we enter into every sexual act, we have the inherent objective of procreation. To willfully choose sexual activity means that we at least tacitly choose procreation.
Now, it often happens that naturally, procreation does not occur. This is not “immoral” as the only willful human acts are the subject of morality or ethics.
When a zygote dies without human willful action it is much like an infant dying without human willful action, it is neither
morally good nor
morally evil. It may certainly be heartbreaking, but it is not morally evil.
It is only intentional human acts which are the subject of ethics.
Consequently, whenever a human deliberately does something which renders sexual acts intentionally non-procreative, they act immorally, contrary to the very objective of the reproductive system. Philosophically speaking, when we use our reproductive system, we inherently “will” to procreate. When we contracept, we simultaneously choose to procreate and NOT procreate. This is contradictory, therefore irrational, therefore immoral. I’ve skipped a lot of steps in the full philosophical argument, but this is the gist.
The claim that the Church’s motive is to have more people to govern is absurd. A friend of mine made this same claim, and I actually spit out coffee in laughter. He wasn’t kidding. I pointed out the irony that he, as non-Catholic, had four children while I only have two. The argument is unconvincing because as stated above, the Church has never stated how many children I ought to have, and certainly has never demanded that I have as many children as biologically possible. This is a myth born of ignorance.
I am perfectly faithful in having two children, one, or none, depending upon the proportionate reasons, and the Church leaves that decision to me. God will certainly judge me if my motives are selfish, but the Church is not worried about how many people they have to govern. However, no matter the proportionate reasons, I may not use immoral means even for a justifiable end.
The Church instead has constantly taught the truth on this matter, which indeed can be discovered through natural reason, but is also revealed supernaturally through Scripture and Tradition.