The reasoning behind the Shettles method is that female and male sperm behave differently: female sperm are slower but live longer, while male sperm move faster and die younger.
Estimating Using Your Menstrual Cycle Figuring Out Your Ovulation Cycle Seeing a Doctor to Determine Gestational Age Community Q&A If you know the date of your last menstrual cycle, you can figure out possible dates of conception using a calendar.
If a girl is your goal, have intercourse regularly, but stop three days before ovulation.
A pregnancy wheel is also known as a gestation calculator.
This is the small calendar that uses your last menstrual period (LMP) to help determine your due date. Rotate the wheel by dragging and move the pointer to select LMP.
However, if all is going well in this pregnancy, your particular hospital may not offer the scan.
Ask your GP if you want to have one anyway for extra reassurance, as she may be able to refer you.