(A,B) Concentrations of steroids and estrogens in each of the three trimesters of pregnancy and post-partum (P-P) as follow: black bars for the first trimester of pregnancy, red bars for the second trimester of pregnancy, blue bars for the third trimester of pregnancy, and green bars for the post-partum period. Data are mean values, and bars represent the corresponding standard deviations (SD). The significance, expressed in terms of p-value, is reported in Table 2 for each time comparison for the observed steroids and estrogens. CORT: cortisol, CCONE: corticosterone, 11DECOL: 11-deoxycortisol, ADIONE: 17-dione, TESTO: testosterone, 17-OHIP: 17α-hydroxyprogesterone, PROG: progesterone, E2: estradiol, E1: estrone.