Length of pregnancy, type of delivery

Does induction increase my odds of having a cesarean?

Excluding scheduled cesareans from the table above, there were 12046 spontaneous labors and 3417 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	19	7	0	2	2	50%		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	2	5	2	29%		40	7	15%	2
256	43	4	3	7	2	22%	1	36	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	102	17	10	27	8	23%	6	75	9	11%	4
260	102	12	7	27	3	10%	3	75	9	11%	4
261	104	8	8	27	4	13%	4	77	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	115	22	9	16	5	24%	6	99	17	15%	3
265	167	14	7	21	3	13%	5	146	11	7%	2
266	232	18	11	55	6	10%	5	177	12	6%	6
267	193	21	4	43	11	20%	3	150	10	6%	1
268	202	17	10	38	6	14%	9	164	11	6%	1
269	231	26	9	30	4	12%	8	201	22	10%	1
270	304	35	9	51	7	12%	4	253	28	10%	5
271	276	29	16	40	8	17%	13	236	21	8%	3
272	328	32	21	50	14	22%	11	278	18	6%	10
273	449	51	43	121	16	12%	37	328	35	10%	6
274	399	40	37	86	16	16%	34	313	24	7%	3
275	389	30	19	70	11	14%	12	319	19	6%	7
276	513	46	17	77	22	22%	16	436	24	5%	1
277	505	54	12	71	24	25%	8	434	30	6%	4
278	512	39	10	74	12	14%	6	438	27	6%	4
279	529	73	8	52	17	25%	5	477	56	11%	3
280	1076	113	30	136	37	21%	15	940	76	7%	15
281	653	57	6	86	12	12%	6	567	45	7%
282	571	65	11	83	18	18%	11	488	47	9%
283	554	51	8	84	19	18%	5	470	32	6%	3
284	513	62	9	97	24	20%	8	416	38	8%	1
285	525	68	1	86	17	17%	1	439	51	10%
286	537	70	7	97	28	22%	6	440	42	9%	1
287	601	75	7	158	31	16%	7	443	44	9%
288	469	71	8	133	35	21%	8	336	36	10%
289	391	46	9	114	23	17%	7	277	23	8%	2
290	389	60	4	121	36	23%	3	268	24	8%	1
291	279	47	6	97	21	18%	6	182	26	13%
292	226	43	0	99	16	14%		127	27	18%
293	200	24	2	77	13	14%	2	123	11	8%
294	162	44	2	80	30	27%	2	82	14	15%
295	100	17	2	60	14	19%	2	40	3	7%
296	55	13	1	27	10	27%	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