Figure 1.

The concepts of involvement of seminal plasma factors in regulation of sperm capacitation (a): 1: sperm coated with SP decapacitation factors (BSP, binder of sperm proteins); 2: decapacitation factors shedded; 3: capacitated sperm: hyperactive motion (b): 1: sperm coated with decapacitation factors (BSP); 2: uterine cavity: BSP still on the sperm head; 3: attachment of GAGs: capacitation; 4: tubular junction GAGs: chemotaxy and capacitation signal (c): 1: sperm coated with SP glycodelin S (Gd-S); 2: Gd-S shedded: capacitation; 3: capacitated sperm; 4: attachment of Gd-F.