Literature searches performed. The numbers represent the order in which the searches were performed.

Table 1: Literature searches performed. The numbers represent the order in which the searches were performed.

Number	Search performed
1	“Menstrual cycle” (title) AND “knee laxity” (title)”
2	“Estrogen/oestrogen” (title) AND “Ligament (title) AND “Human” (keyword)”
3	“Estrogen/oestrogen” (title) AND “Anterior cruciate ligament” (title)”
4	“Menstrual cycle” (title) AND “Anterior cruciate ligament” (title)”