From what age is In Vitro Fertilization advised against? What about motherhood?

In Spain there is consensus not to perform Assisted Reproduction Techniques on women who are older than 49. As for motherhood in general, the end of a woman’s fertile phase  -which is associated with menopause- needs to be taken into account. On average, menopause occurs at age 51.4, but it can occur between ages 48 and 54 as a standard range. Based on this biological principle, the oldest recommended age to become a mother would be 54.