> A older female friend of mine says she's seen this happen all the time: give up on 'trying', and the pregnancy will appear.

People say this about lots of things (stop looking for a perfect job, and it will appear, stop trying so hard to find the perfect mate, and they'll appear, etc), but that doesn't make it a valid strategy, even if it does happen sometimes.

Stop trying is why the Coronavirus pandemic got so bad in the US, and why a climate catastrophe is all but certain in the next couple of decades. Why so many people in the US get so fat and unhealthy (speaking as a fat and unhealthy American myself).

For every person who stopped trying and had what they wanted happen to them anyway, there's plenty of people where that hasn't been true.