This situation brings up some tricky questions about maintaining the mother's health whilst bearing a child much later in life, and ethical considerations about being an active parent for the child when possibly being at a stage in her life where the mum could have less energy to devote to the child. These are thoughts that your friend might have already considered, but I mention them in case she hasn't.
In response to your question, I'd suggest touching base with a natural pregnancy and birth charity called Foresight Preconception that has impressive statistical information on their front page about the effectiveness of their natural approach towards helping parents conceive. http://www.foresight-preconception.org.uk/ For example, with Foresight 78.4% of "infertile" couples have healthy babies, compared to 22.6% with IVF.
Foresight's approach is to work with couples so that they are physically healthy and fit enough to conceive. This typically means looking at diet and improving it through natural means and where appropriate through supplementation, reducing stress levels, and combatting environmental pollution effectively.
Perhaps if your friend rang them up for a chat she could find out where she stands given her age. Foresight was establisehd in 1978 and they have helped literally hundreds of women to conceive naturally.
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