K.K.
This is a tricky one...people who work together often feel a comraderie and in some cases keep in contact even during their off time. This keeps the office time pleasant and fun.
Most of these relationships fizzle out and end once you have moved on to another position, job or stop working all together. The very few who are actually your friends outside of work may feel that if you decided to be an SAHM then you want to spend these first months immersed in her, plus you may be spending a lot of time catching naps when she does to make up for night time interruptions.
Most people will call and visit in the first month and then slowly peter off to nothing or not much by the end of the second month in respect for your bonding time with your child. They figure when you wish to go out and do things you'll let them know and it takes a few of these before they realize you really are ready for regular outings and resumed relations. However, expect even this to be few and far between with and friends who are not parents or even are single and not parents. They often find it harder to hang out with you because they have teh ability to be far more spontaneous than you and havign to schedule all of your fun around a kid and a family can be a downer on the whole spontanaity thing...
Move on with your other friends and family but leave a door open for those few work buds who you felt you were particularly close to by texting them occasionally and asking them along on your fun times. Don't be too hurt if they don't say yes too often at first or at all for that matter. Just remember not all friends are meant to be permanent fixtures in our life. And you willalways have fond memories of the times you spent with them before now..
Good Luck!!! ;-)