How could having irregular menstrual cycles lead to a lack of early prenatal care for some obese women?

obesity it's self often causes irregular cycles so the woman could have no knowledge of the pregnancy for a longer time because this lack of period would be expected. weight gain could also go unnoticed.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek