Length of pregnancy, type of delivery

Does induction increase my odds of having a cesarean?

Excluding scheduled cesareans from the table above, there were 11983 spontaneous labors and 3357 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	15	9	3	1	2	67%	3	14	7	33%
246	18	6	0	1	2	67%		17	4	19%
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	41	18	3	10	6	38%	2	31	12	28%	1
253	32	12	0	6	7	54%		26	5	16%
254	45	9	1	8	3	27%		37	6	14%	1
255	44	9	1	5	2	29%		39	7	15%	1
256	41	4	3	6	2	25%	1	35	2	5%	2
257	52	5	3	7	2	22%	2	45	3	6%	1
258	67	8	3	14	2	13%	2	53	6	10%	1
259	101	17	10	27	8	23%	6	74	9	11%	4
260	99	12	6	25	3	11%	3	74	9	11%	3
261	100	8	8	24	4	14%	4	76	4	5%	4
262	94	23	5	16	5	24%	3	78	18	19%	2
263	119	21	3	22	4	15%		97	17	15%	3
264	112	21	8	16	4	20%	6	96	17	15%	2
265	163	13	7	21	3	13%	5	142	10	7%	2
266	222	17	10	49	5	9%	5	173	12	6%	5
267	189	21	4	41	11	21%	3	148	10	6%	1
268	198	17	9	38	6	14%	8	160	11	6%	1
269	227	26	9	29	4	12%	8	198	22	10%	1
270	300	35	9	50	7	12%	4	250	28	10%	5
271	270	29	15	39	8	17%	12	231	21	8%	3
272	320	32	21	50	14	22%	11	270	18	6%	10
273	440	51	42	119	16	12%	36	321	35	10%	6
274	393	40	36	85	16	16%	33	308	24	7%	3
275	546	30	19	69	11	14%	12	477	19	4%	7
276	504	45	17	76	22	22%	16	428	23	5%	1
277	500	54	12	71	24	25%	8	429	30	7%	4
278	504	38	10	73	12	14%	6	431	26	6%	4
279	518	73	8	50	17	25%	5	468	56	11%	3
280	1055	112	28	134	37	22%	15	921	75	8%	13
281	639	56	6	82	12	13%	6	557	44	7%
282	562	64	11	83	18	18%	11	479	46	9%
283	542	50	8	82	18	18%	5	460	32	7%	3
284	503	62	9	94	24	20%	8	409	38	9%	1
285	520	68	1	85	17	17%	1	435	51	10%
286	529	69	7	97	27	22%	6	432	42	9%	1
287	590	75	7	155	31	17%	7	435	44	9%
288	461	70	8	130	34	21%	8	331	36	10%
289	384	45	9	114	22	16%	7	270	23	8%	2
290	379	58	4	119	36	23%	3	260	22	8%	1
291	275	45	6	97	21	18%	6	178	24	12%
292	216	43	0	95	16	14%		121	27	18%
293	196	24	2	77	13	14%	2	119	11	8%
294	160	43	2	79	30	28%	2	81	13	14%
295	99	17	2	60	14	19%	2	39	3	7%
296	55	12	1	27	9	25%	1	28	3	10%
297	36	13	0	13	8	38%		23	5	18%
298	18	4	0	8	1	11%		10	3	23%
299	17	6	1	6	4	40%	1	11	2	15%
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