CLOCK and infection: Maternal obesity poses significant risks to maternal health, including increased susceptibility to infections during pregnancy (Robinson et al., 2005; Sebire et al., 2001; Stapleton et al., 2005), labor (Acosta et al., 2012; McLean et al., 2012; Salim et al., 2012), and post-partum (Acosta et al., 2012; McLean et al., 2012; Salim et al., 2012), suggesting disruptions in the pregnancy “immune clock”.