Not black magick. A pregnant woman should focus on harmony and health, and feel the love for her unborn baby. Doing more trance and void will also be of benefit.
During pregnancy, you can only practice white magic, the child should not be exposed to any negative energy influences.
During pregnancy, it is very important to conserve energy for your child, i.e. you should not lack energy, as this can negatively affect the child, all meditations and rituals should not take away a lot of energy from you.
During pregnancy, I recommend that you fully focus on your health and the health of your child.