Just found this helpful information regarding Instead cups for fertility on the Instead UK website
Some women use INSTEAD to increase their chances of becoming pregnant. If you’ve been trying for a baby for some time, why not give it a go?
How can INSTEAD be used in this way for fertility?
INSTEAD is designed to be placed around the cervix where it collects menstrual fluid and prevents it from entering the vagina. In exactly the same way, if INSTEAD is inserted immediately after intercourse (or with semen deposited directly in the cup itself), it will help to prevent semen from flowing down the vagina and this may result in a greater quantity entering the cervix.
INSTEAD may be a cost-effective way to assist natural conception for healthy, fertile couples.