Fig. 4From: Effects of maternal inhalation of carbon black nanoparticles on reproductive and fertility parameters in a four-generation study of male miceDaily sperm production and testosterone concentrations in the F3 and F4 offspring. Daily sperm production (× 106) measured in the testes, mean ± SD. Testosterone concentration (ng/ml) measured in plasma, geometric mean ± geometric SD. a DSP F3; b Testosterone F3; c DSP F4; d Testosterone F4Back to article page