Hi, I am 38 and pregnant w/my 2nd child. 1st child was delivered via c-section at 41 wks exactly. Attempted vaginal delivery, but after 24 +hours in labor (took me over 24 hrs to fully dilate and efface) and almost 3 hrs of pushing (daughter never made it past +1 station), c-section was performed. Diagnosis was arrest of descent and was told I have a narrow pubic arch. Despite difficult delivery, daughter experienced no distress the entire time (no decelerations, etc.). Apgars were 9 and 9-she is perfectly normal. Weighed 7 lbs 14 oz at delivery. My pregnancy (delivered at age 35) was completely normal- no high blood pressure, gestational diabetes,swelling, preterm labor (I was overdue but not induced; labor occurred naturally). I have no hx of any health problems, nor does my husband, and both families have excellent health.With this pregnancy I had my 1st u/s at 8 wks (on 2/26/09) to confirm the pregnancy.1st day of my LMP was 1/2/09- this is definitive as I was charting & using an ovulation monitor. Ovulated on day 11-12. My due date prior to the u/s was determined to be 10/9/09. This date was pushed earlier a full week to 10/2/09 b/c the CRL was 19.7 mm. Am having a planned c-section w/ this pregnancy.Concerned about lung maturity at the time of delivery. If the c-section date is scheduled @ 38 wks using the u/s due date (which would really be 37 wks based on first day of LMP), is there a risk of the lungs not being fully matured? I'm even concerned with 39 wks (which would be 38 wks based on first day of LMP). From what I understand, size doesn't mean that the lungs have properly matured, and u/s closer to time of delivery isn't a definitive indicator of lung maturity.Worried sick that baby will be delivered too early w/out full lung maturity.U/S 2 days prior to delivery w/1st child showed no excessive amniotic fluid. Please advise what week you would consider a safe delivery/lung maturity date when my due date has been moved 1 wk earlier due to u/s findings.