“…Although some studies (Wabrek et al, 1971;Ingram, 1981), including our own research group (Callens et al, 2014), suggested that the highest gain in vaginal depth was reached within 4-6 weeks, and that the gain thereafter is minimal, it is unclear from the available data if there exists an optimal window for gaining length. Unfortunately, despite compliance, which can be increased with psychological support (Alderson and Glanville, 2004;Edmonds et al, 2012), conservative therapy can fail (Liao et al, 2011;Michala et al, 2012). No conclusions so far can be drawn on the presence or absence of the hymen relating to failure of treatment (Kimberley et al, 2012), nor whether perineal skin is different from the vagina in its elastic characteristics.…”