Hello, I am designing a small app for the use of my patients, which will be free to download, but I am stuck in two parts of it, one must have a menstrual calendar where patients can mark their menstrual cycle, and another, a gestational age calculator where the patient can enter the date of the last menstrual period and the calculator will tell her how far along she is in the pregnancy and the probable date of delivery. Greetings.
I have sent you pm with the details
I think this document is right for your problem:
Not really. The OP needs date math.
Thank you very much