So Glad We Waited
In 2000, New Yorker Lois Nachamie, a board-certified psychotherapist and couples counselor, wrote a book called So Glad We Waited: A Hand-Holding Guide for Over-35 Parents (with a forward by another older NYC mom, actress Debra Winger, who had her second child after 40). The book spawned the So-Glad-We-Waited Network, which includes playgroups and support groups. New groups form in the fall and spring in a variety of NYC locations, based on interest. To join, call 212-866-5620.

Motherhood Later Than Sooner
After becoming a mom at age 42, Robin Gorman Newman launched her older mothers website and blog, as well as a meetup group for moms 35 and up in the New York area. Events are held in NYC, Brooklyn, Queens, Westchester and Long Island, and are open to moms who had children in their late 30s or 40s. The group is planning a number of activities in celebration of Salute to Moms 35+ Week. Join the meetup group for details.

In Season Mom
If you have questions or concerns about being an older mother but don't want to join a group, consider contacting Cynthia Wilson James, a former childbirth educator who delivered her two daughters after age 40. In addition to her website, which features interviews with moms who conceived and gave birth in their late 30s and 40s, James also offers phone consultations on a variety of parenting topics, including pregnancy and motherhood after 35.

If reading a book is more your speed, here are some great ones that cater to moms over age 35.

• But I Don't Feel Too Old to Be a Mommy!: The Complete Sourcebook for Starting (and Re-Starting) Motherhood
  Beyond 35 and After 40
   
• You Make Me Feel Like an Unnatural Woman: Diary of an Older Mother
   
• Hot Flashes Warm Bottles: First-Time Mothers Over Forty
   
• Midlife Motherhood: A Woman-to-Woman Guide to Pregnancy and Parenting
   
• Your Over-35 Week-by-Week Pregnancy Guide: All the Answers to All Your Questions About Pregnancy, Birth, and Your Developing Baby
   
• Older Mothers: Conception, Pregnancy and Birth After 35

Finally, for women hoping to become pregnant after age 40, there's Resolve, offering both peer- and professional-led support groups like Women’s Parenting After Egg Donation and Moving from Infertility to Adoption in a variety of NYC locations.