Length of pregnancy, type of delivery

Does induction increase my odds of having a cesarean?

Excluding scheduled cesareans from the table above, there were 12091 spontaneous labors and 3434 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	48	10	1	8	4	33%		40	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	68	8	3	14	2	13%	2	54	6	10%	1
259	103	17	10	28	8	22%	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	117	22	9	18	5	22%	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	197	21	4	43	11	20%	3	154	10	6%	1
268	203	17	10	38	6	14%	9	165	11	6%	1
269	234	26	9	31	4	11%	8	203	22	10%	1
270	305	35	9	51	7	12%	4	254	28	10%	5
271	277	30	16	40	8	17%	13	237	22	8%	3
272	328	32	21	50	14	22%	11	278	18	6%	10
273	450	51	43	121	16	12%	37	329	35	10%	6
274	400	40	37	86	16	16%	34	314	24	7%	3
275	390	30	19	70	11	14%	12	320	19	6%	7
276	515	46	17	78	22	22%	16	437	24	5%	1
277	507	54	12	71	24	25%	8	436	30	6%	4
278	515	39	10	75	12	14%	6	440	27	6%	4
279	532	73	8	52	17	25%	5	480	56	10%	3
280	1081	114	30	138	37	21%	15	943	77	8%	15
281	655	57	6	87	12	12%	6	568	45	7%
282	572	65	11	83	18	18%	11	489	47	9%
283	557	51	8	84	19	18%	5	473	32	6%	3
284	516	62	9	97	24	20%	8	419	38	8%	1
285	525	69	1	86	18	17%	1	439	51	10%
286	539	70	7	98	28	22%	6	441	42	9%	1
287	605	75	7	159	31	16%	7	446	44	9%
288	471	71	8	134	35	21%	8	337	36	10%
289	394	46	9	115	23	17%	7	279	23	8%	2
290	390	60	4	121	36	23%	3	269	24	8%	1
291	280	48	6	98	22	18%	6	182	26	13%
292	227	43	0	99	16	14%		128	27	17%
293	201	24	2	77	13	14%	2	124	11	8%
294	163	44	2	81	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