Length of pregnancy, type of delivery

Does induction increase my odds of having a cesarean?

Excluding scheduled cesareans from the table above, there were 11995 spontaneous labors and 3402 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	16	9	3	1	2	67%	3	15	7	32%
246	18	7	0	1	2	67%		17	5	23%
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	42	18	3	10	6	38%	2	32	12	27%	1
253	32	12	0	6	7	54%		26	5	16%
254	47	10	1	8	4	33%		39	6	13%	1
255	45	9	1	5	2	29%		40	7	15%	1
256	42	4	3	7	2	22%	1	35	2	5%	2
257	54	5	3	7	2	22%	2	47	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	101	12	7	26	3	10%	3	75	9	11%	4
261	103	8	8	27	4	13%	4	76	4	5%	4
262	94	23	5	16	5	24%	3	78	18	19%	2
263	125	21	3	22	4	15%		103	17	14%	3
264	113	22	8	16	5	24%	6	97	17	15%	2
265	167	14	7	21	3	13%	5	146	11	7%	2
266	230	17	11	55	5	8%	5	175	12	6%	6
267	192	21	4	43	11	20%	3	149	10	6%	1
268	201	17	9	38	6	14%	8	163	11	6%	1
269	231	26	9	30	4	12%	8	201	22	10%	1
270	302	35	9	51	7	12%	4	251	28	10%	5
271	275	29	15	40	8	17%	12	235	21	8%	3
272	328	32	21	50	14	22%	11	278	18	6%	10
273	444	51	43	120	16	12%	37	324	35	10%	6
274	397	40	37	85	16	16%	34	312	24	7%	3
275	387	30	19	69	11	14%	12	318	19	6%	7
276	510	46	17	76	22	22%	16	434	24	5%	1
277	503	54	12	71	24	25%	8	432	30	6%	4
278	510	39	10	74	12	14%	6	436	27	6%	4
279	527	73	8	51	17	25%	5	476	56	11%	3
280	1073	113	30	135	37	22%	15	938	76	7%	15
281	649	57	6	85	12	12%	6	564	45	7%
282	569	65	11	83	18	18%	11	486	47	9%
283	554	50	8	84	18	18%	5	470	32	6%	3
284	511	62	9	97	24	20%	8	414	38	8%	1
285	525	68	1	86	17	17%	1	439	51	10%
286	536	70	7	97	28	22%	6	439	42	9%	1
287	599	75	7	157	31	16%	7	442	44	9%
288	468	71	8	133	35	21%	8	335	36	10%
289	387	46	9	114	23	17%	7	273	23	8%	2
290	385	60	4	121	36	23%	3	264	24	8%	1
291	279	47	6	97	21	18%	6	182	26	13%
292	223	43	0	98	16	14%		125	27	18%
293	198	24	2	77	13	14%	2	121	11	8%
294	162	44	2	80	30	27%	2	82	14	15%
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	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