Child Attachment

Victoria
Is there anyone else who is currently pregnant or that was pregnant and their son was attach to them. My 1 in a half year old is very attached/clingy to me now and he even cries more. This is kind of new to me because when I was pregnant with him my oldest son was two at the time and he wasn't attached at all. What does this mean and what can I do to control his attachment because he doesn't go to anybody else but his father and he cries too much now.!