Length of pregnancy, type of delivery

Does induction increase my odds of having a cesarean?

Excluding scheduled cesareans from the table above, there were 11824 spontaneous labors and 3334 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	31	12	0	6	7	54%		25	5	17%
254	45	9	1	8	3	27%		37	6	14%	1
255	44	9	1	5	2	29%		39	7	15%	1
256	39	4	3	6	2	25%	1	33	2	6%	2
257	51	5	3	7	2	22%	2	44	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	96	12	6	24	3	11%	3	72	9	11%	3
261	99	8	8	24	4	14%	4	75	4	5%	4
262	93	23	5	16	5	24%	3	77	18	19%	2
263	117	21	3	21	4	16%		96	17	15%	3
264	112	21	8	16	4	20%	6	96	17	15%	2
265	161	13	7	21	3	13%	5	140	10	7%	2
266	220	17	9	49	5	9%	5	171	12	7%	4
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	297	35	9	48	7	13%	4	249	28	10%	5
271	269	29	15	38	8	17%	12	231	21	8%	3
272	319	32	21	50	14	22%	11	269	18	6%	10
273	438	51	42	117	16	12%	36	321	35	10%	6
274	392	40	36	85	16	16%	33	307	24	7%	3
275	445	30	18	69	11	14%	11	376	19	5%	7
276	499	45	16	75	22	23%	15	424	23	5%	1
277	496	54	12	70	24	26%	8	426	30	7%	4
278	504	38	10	73	12	14%	6	431	26	6%	4
279	515	73	8	50	17	25%	5	465	56	11%	3
280	1048	112	28	134	37	22%	15	914	75	8%	13
281	638	53	6	82	10	11%	6	556	43	7%
282	559	63	11	82	17	17%	11	477	46	9%
283	535	50	8	82	18	18%	5	453	32	7%	3
284	501	62	9	94	24	20%	8	407	38	9%	1
285	519	68	1	85	17	17%	1	434	51	11%
286	529	69	7	97	27	22%	6	432	42	9%	1
287	585	75	7	154	31	17%	7	431	44	9%
288	459	69	8	129	34	21%	8	330	35	10%
289	379	45	8	112	22	16%	7	267	23	8%	1
290	376	57	4	118	35	23%	3	258	22	8%	1
291	274	45	6	96	21	18%	6	178	24	12%
292	216	42	0	95	15	14%		121	27	18%
293	195	24	2	76	13	15%	2	119	11	8%
294	160	43	2	79	30	28%	2	81	13	14%
295	99	16	2	60	13	18%	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