The link discusses work being done toward lab-produced human sperm and egg cells. As I understand it, artificially produced sperm cells have been produced for mice. The scientist is confident human versions will be available eventually, perhaps with both sperm and eggs.
I’ve read the Catholic Church does not approve of human eggs fertilized in petri dishes. This is done everyday and brings joy to couples who otherwise would not have babies. The site I looked at said Catholics are among the religious couples using in vitro fertilization. Like birth control which most Catholics practice, the Church thinks it has an obligation to make judgments about peoples’ personal decisions.
The Catholic Church, like other branches of the faith, claims to hold steadfastly to its principles while accommodating all kinds of violations. If it held fast to its condemnation of birth control and kicked out those who practice it there would be almost no Catholics left. Its clergy would starve. That is why we see accommodation to both birth control and in vitro fertilization.
If for some reason artificially produced human sperm and egg cells became a common practice we could expect the Church not to approve but accept in good standing members who used this procedure. Religion is a business.
If history is a guide, we can expect unheard of technological advances in reproduction. We can expect religion to accommodate these advances.
The conservative branch of Christianity preaches it does not change while it continues to change.