AQP1 and ovarian hyperstimulation syndrome: For the OHSS rats (PMSG plus hCG), in the presence of an AQP1 inhibitor, HgCl2 (to block water exocrine), the forskolin-induced Isc from the peritoneal epithelial cells of OHSS rats (PMSG plus hCG) was substantially decreased compared with that in untreated controls of the OHSS rats (Figure 6 A-C).