E.W.
S.,
How about having a "sip and see" tea party after the baby is born. That way, guests will know the gender. If you have another girl, the hostess can then suggest other necessities or just have a gracious little gathering welcoming you new one with no expectation of gifts. I did this with my 3rd baby. No one felt obligated to buy a gift and we all had a nice time holding and cooing over the baby.