The TRPV3 channel agonist, carvacrol, induces Ca2+ responses and activation in MII mouse eggs. A. Changes in [Ca2+]i induced by TRPV3 channels activated by 50 μM carvacrol (violet), 200 μM 2-APB (red), and ionomycin (green) in TrpV3+/− and TrpV3−/− cells (V3-Het, n=4; V3-KO, n=4). B. Activation of TrpV3+/−, but not TrpV3−/− eggs, by treatment with 50 μM carvacrol (37°C, 10 min). Arrows indicate PN formation (5 h, left panel) and cell cleavage (24 h, left panel). C. Percentages of PN formation in WT (TrpV3+/+, CD1 strain), heterozygous (TrpV3+/−) and V3-KO (TrpV3−/−) eggs 5–6 h after of carvacrol activation. Numbers of eggs undergoing PN formation/total number of eggs is indicated. D. Percentage of eggs cleaved after 24 h exposure to carvacrol. Numbers of 2, 3, or 4-cell blastomeres over the total number of eggs is indicated. Data are averages ± S.E.M.