Figure 7. Embryonic offspring from fshb and lhb-deficient zebrafish (fshb^−/− and lhb^−/−).

The fertility of homozygous fshb and lhb mutant fish was assessed by natural breeding between mutants or with wild-type fish. Both male and female fshb mutants were fertile with healthy and viable progeny (A), whereas male lhb mutant was fertile but not females (B). Twenty-two lhb-deficient females were examined, but none succeeded in spawning (Figure 5).