There are internet forums for ladies who are all due about the same time. I found it very helpful to join a birth board during my pregnancy, and be surrounded by people who were all at about the same stage, give or take a few weeks. It was exciting to cheer the others on, compare everyone’s experiences, and be grateful for the blessings I had in my life that others may have been lacking. (I remember one poor lady— she thought she had a normal boyfriend, but it turns out, she was his “other woman” and he already had a wife and family. It was really heartbreaking, and we did our best to be supportive for her. I remember how desperate she was to try to get him to have some sort of relationship with his daughter, who he had absolutely zero interest in-- very heartwrenching.)
I stuck with each of my birth boards for about two years after my little guys were born, as we dealt with infants who were all at about the same stage, and we cheered each other on for the milestones, and having a ready-made peer group was really useful for figuring out how our own little guys compared.