
On a recent gathering on a sailboat there were six people, no wind, relatively cold weather and only two of us on board had children of his/her own. Given the poor sailing conditions, there was plenty of time to converse. A gynecologist among us asked me whether there were indications in one's horoscope permitting to know about having children or not. Despite her professional expertise (and being pretty), she had not been able to have children, hence her question.
With no children myself, and having studied some astrological textbooks and what they say in this respect, here's the gist of our "sailor's conversation":

House 5 (the house of procreation or creativity) in a person's map is indicative of the likelihood of having or not having children in one's life. It is evidently more certain if there are - or not - any planets in the maps of both persons forming a couple. If there is a personal planet (except Mercury) in the map of one of them, this may indicate children. But they will only be of "little importance" to one of the parents, if he/she has no planet in his/her House 5. (The children concerned will probably not like that parent as much as the other).
In my natal map there is one planet in 5: as it happens, it's Mercury. I never wished to have children myself (the prospect of being a father was too much of a "bourgeois thing" for me). I quite seriously investigated, astrologically as well, this personal option of mine. Born in 1943 in the Swiss Alps, I have lived as a child the invasion by "too many tourists" of our then beautiful and quasi-virgin surroundings. It started in 1948 with the winter Olympics in St. Moritz, then came Club Med in the 60's and all the "Nouveau Riches" and their imitators who fatally would be following. At such an early age I had no idea of great agglomerations, the suburbs of big cities and other even worse, overcrowded places in this world. To me as a youngster, a place that quadrupled in population during the tourist season was an abomination. To wait for over an hour to go up a ski-lift was hardship, so spoiled we were then.
To tell it straight and right at the beginning here: in my opinion, maybe very egoistically, the world at large would be better off if there were fewer people. Economic "imperatives" however appear to say the contrary. For obvious, commercial reasons. Accepted norm says that there should be "economic growth, and better steadily, so even the lazy can prosper". And with them the automobile - and so many other polluting industries, even the defense-industries. Following the principle that the more the world gets crowded, the more augment the risks of conflict. And consequently the need to "defend" one's possessions or territory.
From the preceding it's evident that our modern politico-public-government-capitalistic-(or-not) -social-system wants us to continue to grow in numbers. All over the place. Even some today still important churches contribute to that by categorically opposing contraception etc. And then people complain about pollution. If not about that produced in their own country, unfailingly of the pollution created by their neighbors.
Respecting the recommended principle of keeping a balanced view, one must, given the world's situation today, laud a recent initiative by the Indian Government. The situation in India being close to getting out of hand (even more today as everybody there also wants a car or at least a motorbike), the Indian authorities recently announced that they "will pay recently married couples not to have kids". Half the population in India is under age 25. China did the same some 30 years ago, starting under Mao. Only they did not offer to pay. There it was by threatening with punishment, even jail. Costs less and is probably more efficient. But India is still influenced by the more polite British...
This being a bit of a complex subject, it's probably useful to look at it the way one cuts a chicken, piece by piece, the legs first.
In the centuries past, when Europe and other places were at times suffering from a lack of population growth (famines, pest, wars) and their way of life, mostly agricultural, demanded permanent replenishment of young human beings (farm-arms), our ancestors did what was required. Women were quasi-constantly pregnant. Question of survival. This appears to still be the "ideal" pursued by a certain church with it's headquarters in Rome. The same type of pundits who pretended that the earth is flat until that idea became unsustainable.
In modern times, medical and other progress helping, including of course the pill, God (or what one may differently call "Higher Events in Human Evolution"), brought about, and for the first time, the possibility of choice in this question of procreation. For entire nations and for each person individually. This time, and that's new, the environment starts being taken into account. Maybe or foremost, the main reason being that humans have become an ever more polluting species. It's not just CO2 or our mountains of garbage. But many other factors: to e.g. produce 1 ton of steel, over 7 tons of water are wasted. Etc. etc.
For atheists and people not particularly religious, the demands of a healthy environment appear to be enough reason to start thinking about what's healthy for our environment in terms of populating the planet. So they mostly agree that some limitation to population growth is desirable. To the more religiously inclined, one may suggest that if God (or their particular God) has recently permitted that some scientists invent the pill and other methods to limit undesirable procreation (the pill for the day after, or 5 days after), they'd better listen as well. If not for themselves, at least by not opposing those who do wish to contribute to limit the excessive growth of the world's population.
In a way, humanity is being faced on various fronts with the same basic question: how to take better care of our planet. It's about resources, population growth and the well-being of those already in existence. The capitalistic "economic-growth-is-needed-concept" no doubt requires some profound revision.

To end these considerations on an astrological note: If there are planets in House 5 of a person or in the respective houses 5 for both partners in a couple, it's likely that children will be born. There is however no planetary indication as to the number of children they should have. So reason (and not hazard) can limit that.
Also, if it turns out to be difficult for somebody to have children, maybe before running to consult the expensive "X-famous-gynecologist-wonder-child-producer" and have some implanted-semi-artificial child, it might be intelligent first to consult a competent astrologer. If there are indications in the horoscope for children, then go and see the wonder doctor. If not and the desire to have a child is strong, consider to adopt. That can be doubly useful, for the adopted child and by not adding more people to what may already have reached the limit of desirable numbers of humans on this earth.