CLOCK and Obesity: We searched the PubMed/MEDLINE databases for studies published in English between January 1990 and January 2020, using the following search terms: “light”, “circadian rhythm”, “chronodisruption”, “clock gene”, “melatonin”, “pineal”, “glucocorticoid”, “developmental programming”, “DOHaD”, “offspring”, “progeny”, “cardiovascular diseases”, “obesity”, “hypertension”, “neurological diseases”, “pregnancy”, “mother”, “maternal”, “gestation”, “neonatal”, “perinatal”, “light therapy”, “photobiomodulation”, and “reprogramming.”.