What you are considering is potentially a great act of gemilut chassadim, lovingkindness. Still, the halachot of surrogacy are complex.
One question is determining who is halachically the mother of the child – the one who gives birth, or the genetic mother. For an overview of some of the issues, please see our article on the topic. There are also psychological and physical considerations, which are outside the parameters set for this website. We urge you to explore them as well.
This is a complex halachic issue which requires knowing the specific details of the individual situation. To discuss this further, we invite you to arrange a personal consultation with a Nishmat Fertility Counselor, a Yoetzet Halacha who has completed additional specialized training in this area. Consultations are free and can take place in person, by phone, or via internet conference. Your friend might also benefit from arranging a consultation.
This response was updated on 8 April, 2021.