Harlequin Presents Readers discussion

The first book that comes to mind is: More than a Convenient Marriage?

The ones I thought of were not necessarily Harlequin Presents but rather from HP Medical line.
The Surgeon's Meant-to-be Bride
Desert Prince, Expectant Mother
The Surgeon's Runaway Bride

There is a list of books with miscarriages/separations https://www.goodreads.com/list/show/1...

List of books with IVF- though maybe not quite what you were looking for: https://www.goodreads.com/list/show/3...

The Scorsolini Marriage Bargain I'm pretty sure this HP has heroine struggling with fertility issues.

Getting Married Again, h has a difficult pregnancy.
The Millionaire's Baby, h has preeclampsia

there's one HP that I remember, no idea the title, but the H is South American and the h is American, Midwest who lives on a ranch. She miscarried and had a hard time coming to terms and goes home. Ending he flies to her farm and she runs to him. does this ring any bells?