Respect for all human lives from the very beginning
At the Annunciation, the human life of Jesus Christ began in the womb of the Virgin Mary. At this moment, as with the ordinary conception of other humans, a new human being began.
This is of course also true of the fusion of sperm with ovum in a laboratory dish. One of the makers of the first “test-tube baby” described the few-days-old, full-stop-sized embryo as “a microscopic human being in the very earliest stage of its development” (A Matter of Life, Steptoe and Edwards).
Many human embryos are daily destroyed by so-called contraceptive pills which have a back-up effect of ending any lives which have begun. The Church opposes artificial contraception – though not natural family planning – as interfering with the total self-giving of married couples.