MC Has Kids and / or is Married from the Beginning

ML is married.

FL is married + no kids. Her husband is arguably the ML.

FL is divorced + 1 kid.

At the beginning of the drama the FL is briefly in a bad marriage in the UK. Her husband is sterile and in an effort to save the marriage she undergoes a procedure to become pregnant via an anonymous sperm donor. Her husband finds out and they get divorced + the FL moves back to Shanghai.

ML is married. 

FL is a widow with daughter.

FL has kids + her marriage is falling apart.

FL is separated from her husband + daughter.

Both leads are married and have a daughter.

ML is married.

ML is married.

FL gave birth to a child of a previous marriage years ago. She was tricked into believing that the child had not survived, but it had. 

ML has an adopted daughter. 

The FL and either the ML or the ML's brother (watch to find out) are married from the beginning.