GH1 and spontaneous abortion: These results confirm that while the manipulation of both Ca2+ and 5-HT metabolisms during this timeframe resulted in related positive effects on the ensuing lactation [52,53,54], on the one hand, a diet rich in tryptophan, a precursor of 5-HT, induces negative effects on fetal growth hormone secretion, inducing its limited development and growth [55] while also increasing the risk of miscarriage [21].