How to Limit the number of Spouse Contacts to 4?

Summary:

For male employees, business want to limit the number of Spouse Contacts to 4. System should not allow to enter more than 4 Spouses.

Content (required):

While creating Family and Emergency Contact, user(Male) can create add up to 4 spouses, and it also restrict females to add only single spouse.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):