months of fertility are Magh, Vaishakh and Kartik spend in sun before sunset -- for vitamin D Ganges aobserve a fast and consume Calcium rich udad ki daal or sesame products. Getting married to Tulasi - in karthik month black Tulsi or Shyama Tulsi seeds are known to increase the sperm count of a person and increased ovulation https://www.happymarriages.com/the-science-behind-unique-indian-wedding-rituals/