Is there any known association between caffeine intake and late ovulation (long follicular phase)?
DH (31) Me (32). Started charting 7/10/12. My chart
1st BFP 11/19/12 --> loss @ 15 weeks (Feb 2013). Baby measured 9 weeks.
2nd BFP 5/13/13 --> Zachariah born on 1/29/14 @ 39w5d, 10lbs 2oz and a home waterbirth.
Most of the articles I found were pretty old (done in the early 90s) but one of them suggests the opposite--that a shorter menstrual cycle seemed slightly more common in women who consumed a lot of caffeine. A lot of caffeine is defined as 300 mg, and there is approximately 100mg of caffeine in 8 oz of brewed coffee. Here's a link to the most relevant study: http://aje.oxfordjournals.org/content/149/6/550.full.pdf. Their study concludes "caffeine intake was not strongly related to an increased risk for anovulation, short luteal phase (<10 days), long follicular phase (<24 days), long cycle (<36 days)..."
I skirt the limit of "a lot" of caffeine--right under 24 oz a day. I'm a coffee hound. I do tend to have slightly shorter than average cycles (usually around 25 days) although I've had some wacky ones lately.
Hope that helps!
Me: 37 DH: 35
Uterine septum & endometriosis Rx July '12; hysteroscopy & laparoscopy done Sept. '12. TTC #1 since Nov '12! "Skinny" PCOS
Cycles #1-5, Nov '12 - April '13: Lots of ART, lots of BFNs
Cycle #6, May/June '13: No ART, just a super clean diet (Whole30). O on CD36... BFP 7/1/13! EDD: 3/13/14
Noah Elsayed born 2-26-14
I recently cut out caffein and haven't noticed any difference.