How can a wife's pregnancy be known ten days after marriage, and what is forbidden between spouses?

Physicians and specialists are the ones who answer the question of the wife's pregnancy, with patience and entrusting the matter to Allah. As for what is forbidden between spouses, they are: intercourse during menstruation, based on the Almighty's saying: "And they ask you about menstruation. Say, 'It is a discomfort, so keep away from women during menstruation. And do not approach them until they are pure. And when they have purified themselves, then come to them from where Allah has ordained for you.' Indeed, Allah loves those who repent and loves those who purify themselves," and anal intercourse, based on the Prophet's (peace be upon him) saying: "Whoever has intercourse with a menstruating woman or a woman in her anus has disbelieved in what was revealed to Muhammad (peace be upon him)," and doing anything that leads to swallowing impurities.