When does a diaphragm need to be refitted?

The diaphragm should indeed be refitted if there is a significant change in weight. This is crucial because a woman’s weight can significantly affect the fitting of a diaphragm, potentially leading to an ineffective barrier method for contraception. If a woman's weight changes significantly, the diaphragm may not fit properly, which can compromise its efficacy in preventing pregnancy.

In addition, it’s also important for a diaphragm to be checked and potentially refitted after a concurrent pregnancy, as that experience can alter the woman's anatomy. However, refitting strictly due to significant weight changes is often prioritized over time intervals or client requests. Regular assessment of the fit and comfort of the diaphragm should be a standard part of any continuation of its use, particularly after substantial weight fluctuations.