Should a woman stop breastfeeding a 10-month-old baby due to pregnancy, or is it permissible to continue, and is breastfeeding a child during pregnancy forbidden or allowed?

Breastfeeding a child during pregnancy is subject to the discretion of a trusted doctor: If he believes there is no harm to the fetus and the nursing child, then there is no objection. However, if it is harmful to either of them, then it is not permissible.