We had a similar problem and used to spray those air freshener sprays towards the source of the smoke whenever we noticed it. The advantage is that those sprays can travel downwards unlike other sources of smell (our neighbor lived below us). And they can be quite strong and linger. And depending on your local laws, you can't just pollute the air with anything you choose, but it's hard to argue against air freshener ("I just wanted my smoke filled balcony to smell nice!"). Whether it worked for us, no, not really, I don't think the neighbor was even sensitive to strong smells.You could hypothetically build some kind of smoke detection system that would automate this, but I think any cigarette smoke detectors won't work better on outside air than your nose.
It could be problematic in early pregnancy because the embryo relies on corpus luteum until placenta is developed (without corpus luteum the pregnancy would not continue). Afterwards it does not make a difference. I am not sure what happened in this case that the pregnancy was successful.
Yes. I found it interesting that fertility specialists are actually quite focused on statistics. It's because in majority of infertility cases there is either no explanation at all, or no absolute blockers to pregnancy, just less chances. The entire field is in big part focused on how to improve patient's chances in this dice roll.
I don't have a great data source, but from my experience (as a woman that tried to conceive two kids), reddit has awesome communities with users that can absolutely dig out those stats for you, if they exist: r/TryingForABaby, r/infertility
My theory is that many not-that-rich countries didn't have opportunity to go through a period where some jobs are thought as strictly male/female (think 50s in the US). Coming from such a country, and being a woman, I never heard from my parents, or another adult for that matter, that engineering wouldn't be suitable for a girl. This wasn't just because there is money in engineering. It was the same for less lucrative professions in STEM. The concept of woman needing to pick a suitable profession was just not there. Education was important for both genders. I am very thankful for that and it bothers me when people say women from my part of the world enter STEM just because of money. It's just not true for majority of STEM women that I met.