Nikaah & Marriage Issues

Determining compatibility between spouses by matching their names and dates of birth

Q: I'm a 22 year old female and I have a friend who believes in hisaab. He wants to get married but he went to the imam to ask him whether he is compatible with the girl. So the imam asked for her name and date of birth to determine compatibility and whether she would be a good wife; how she will be with him and his family. He also predicted that my friend would most likely remain unmarried because he won't find anyone compatible to him. And my friend doesn't know how he used names and date of birth to determine compatibility because the imam went into a different room.

I told my friend that this is haraam in our religion because only Allah knows our future and this is no different than going to a fortune teller or believing in astrology and horoscopes and it's clearly mentioned in Islam that this is haraam because it's associating with Allah, but he doesn't believe me. I'm very worried for him and I would like to know from a knowledgeable person if this is allowed in Islam. 

Registering adopted child under the adoptive fathers name

Q: May I ask if me and my husband can adopt and register under my husband's last name my sisters's (non-muslim sister) newborn child. Due to some circumstances the baby cant be registered because the father wont allow to put it under his name. (Unfortunately they are not married), so we are finding the way to help the baby to be registered and that is why we came up with the idea of adopting the child instead. Is it permissible? There is no possibility to put the baby's name under her own father.

Giving up masturbation

Q: I am a 26 years old Male. I have a very bad habit of Masturbation. At night when I got to sleep, bad thoughts come into my mind, and then I start to think about girls. It induces me to masturbate and as a result semen is ejaculated. I want to stop this bad habit. Please help me out. I am very much tensed. I also make tawba to Allah Ta'ala but then again this thing happens. Don't know what to do. Please guide me. Is this due to this bad habit my Duas sometimes are not answered?

Women working

Q: Is it permissible to use contraceptive medications to delay having children because the couple is studying and working in a tough field (e.g. medicine)?