From Lark software Studio:
A software for mothers -to-be and fathers-to-be, can help you give birth to a perfectly healthy little baby!
This is the calendar software designed for women at childbearing age. You will just set the first date of your period, time of menstrual cycle, duration of your period, luteal phase parameters, the software is able to mark the different stages of Menstrual Cycle on the calendar scientifically with different colors or graphics- which days are easy for pregnancy, which days are in the safe period, which days are for ovulation, how big the pregnancy chance is, whether it is easy to give birth to boy or girl. It is easy to understand when you compare with the color lump mark, and you can drag the right scroll bar of the chart to view more comprehensive information