Length of pregnancy, type of delivery

Does induction increase my odds of having a cesarean?

Excluding scheduled cesareans from the table above, there were 12190 spontaneous labors and 3469 inductions. 9% of the spontaneous labors ended in cesarean and 19% of the inductions ended in cesarean.

Some people have looked at these numbers, and the fact that there seems to be an increase in cesareans after 40W0D, and wondered if there's a correlation. In other words, do "timeline-based" inductions lead to increased cesareans? That analysis gets tricky, so I'll just post the numbers and let you decide yourself what's going on.

Day	Total			Following inductions				Following spontaneous labor
	Vaginal Births	Unscheduled Cesareans	Scheduled Cesareans	Vaginal Births	Unscheduled Cesareans	% Unscheduled Cesareans	Scheduled Cesareans	Vaginal Births	Unscheduled Cesareans	% Unscheduled Cesareans	Scheduled Cesareans
245	17	10	3	1	3	75%	3	16	7	30%
246	20	7	0	2	2	50%		18	5	22%
247	19	5	0	1	1	50%		18	4	18%
248	25	8	2	5	4	44%	1	20	4	17%	1
249	22	15	0	3	10	77%		19	5	21%
250	32	5	0	6	4	40%		26	1	4%
251	26	1	0	2		0%		24	1	4%
252	43	18	3	10	6	38%	2	33	12	27%	1
253	32	12	0	6	7	54%		26	5	16%
254	48	10	1	8	4	33%		40	6	13%	1
255	46	10	2	6	3	33%		40	7	15%	2
256	43	4	3	7	2	22%	1	36	2	5%	2
257	55	5	3	8	2	20%	2	47	3	6%	1
258	68	8	3	14	2	13%	2	54	6	10%	1
259	104	17	10	28	8	22%	6	76	9	11%	4
260	105	13	7	28	4	13%	3	77	9	10%	4
261	105	8	9	28	4	13%	5	77	4	5%	4
262	94	23	5	16	5	24%	3	78	18	19%	2
263	126	21	3	22	4	15%		104	17	14%	3
264	118	22	9	18	5	22%	6	100	17	15%	3
265	168	14	7	21	3	13%	5	147	11	7%	2
266	237	18	11	56	6	10%	5	181	12	6%	6
267	204	21	4	45	11	20%	3	159	10	6%	1
268	205	18	10	39	7	15%	9	166	11	6%	1
269	236	26	9	31	4	11%	8	205	22	10%	1
270	308	35	9	51	7	12%	4	257	28	10%	5
271	279	30	16	40	8	17%	13	239	22	8%	3
272	333	32	21	50	14	22%	11	283	18	6%	10
273	455	53	43	123	18	13%	37	332	35	10%	6
274	407	41	37	88	17	16%	34	319	24	7%	3
275	395	30	19	71	11	13%	12	324	19	6%	7
276	516	46	18	78	22	22%	16	438	24	5%	2
277	513	55	12	72	25	26%	8	441	30	6%	4
278	519	40	10	75	12	14%	6	444	28	6%	4
279	535	73	8	52	17	25%	5	483	56	10%	3
280	1092	114	30	140	37	21%	15	952	77	7%	15
281	659	58	7	88	12	12%	7	571	46	7%
282	578	65	11	85	18	17%	11	493	47	9%
283	560	52	8	84	19	18%	5	476	33	6%	3
284	518	62	9	97	24	20%	8	421	38	8%	1
285	528	69	1	88	18	17%	1	440	51	10%
286	542	70	7	99	28	22%	6	443	42	9%	1
287	608	75	7	159	31	16%	7	449	44	9%
288	476	71	8	135	35	21%	8	341	36	10%
289	398	46	9	117	23	16%	7	281	23	8%	2
290	391	60	4	121	36	23%	3	270	24	8%	1
291	284	48	6	100	22	18%	6	184	26	12%
292	229	43	0	100	16	14%		129	27	17%
293	202	24	2	77	13	14%	2	125	11	8%
294	164	44	2	81	30	27%	2	83	14	14%
295	101	17	2	60	14	19%	2	41	3	7%
296	56	13	1	27	10	27%	1	29	3	9%
297	36	13	0	13	8	38%		23	5	18%
298	18	4	0	8	1	11%		10	3	23%
299	19	6	1	6	4	40%	1	13	2	13%
300	12	2	0	3	1	25%		9	1	10%

Due Date Survey Data Due date statistics: A study on the length of pregnancy Probability of delivery resulting from spontaneous labor after 35 weeks Probability of delivery within x days of a given date Length of pregnancy by week Spontaneous labor and due date determination Length of pregnancy, comparing subsequent births for individual moms Length of pregnancy for first time vs. second & third time moms Length of pregnancy, type of delivery Gestation vs. Birthweight Probablity of Induction after a given day Average day of spontaneous labor vs. age of mother at time of birth Are more babies born during a full moon? What's the most common day of the week for babies to be born? I'm still pregnant at 40W. What's it mean? Do winter babies arrive later? What if I know my conception date? Are boys or girls born later? Subsequent pregnancy date search How do inductions bias the due date statistics? Download the data Birth Stories Survey input dates

More Resources Pregnancy Day-by-Day Fast pregnancy calendar Baby age calendar EDD Icon Generator Jo's Birth Story Weeks vs. Months Explained Charts generated by flot spacefem.com spacefem@spacefem.com