Prices
The price for a (metric) ton [1000 kg] of Lanthanum oxide 99% (FOB China in USD/Mt) is given by the Institute of Rare Earths Elements and Strategic Metals as below $2,000 for most of the period from early 2001 to September 2010 (at $10,000 in the short term in 2008); it rose steeply to $140,000 in mid-2011 and fell back just as rapidly to $38,000 by early 2012. The average price for the last six months (March to August 2022) is given by the Institute as follows: Lanthanum Oxide - 99.9%min FOB China - 1305 EUR/mt and for Lanthanum Metal - 99%min FOB China - 3784 EUR/mt. See also
| CASNo_Ref =  Y
| CASNo = 7439-91-0
| UNII_Ref =  Y
| UNII = 6I3K30563S

References
Bibliography
Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. ISBN 978-0-08-022057-4. Further reading
The Industrial Chemistry of the Lanthanons, Yttrium, Thorium and Uranium, by R. J. Callow, Pergamon Press, 1967
Extractive Metallurgy of Rare Earths, by C. K. Gupta and N. Krishnamurthy, CRC Press, 2005
Nouveau Traite de Chimie Minerale, Vol. VII. Scandium, Yttrium, Elements des Terres Rares, Actinium, P. Pascal, Editor, Masson & Cie, 1959
Chemistry of the Lanthanons, by R. C. Vickery, Butterworths 1953
Women with a bicornuate uterus are at an increased risk of recurrent miscarriage, preterm birth, malpresentation, disruptions to fetal growth,  premature rupture of membranes, placenta previa and retained placenta (which can lead to postpartum hemorrhage). This is due to the distortion of the normal shape of the uterus, distortion of the cervix leading to cervical insufficiency, or under-vascularization of the endometrium as the pregnancy requires more blood supply. In some cases, the nonpregnant horn can rupture during labor, necessitating emergency surgery.Fetuses developing in bicornuate uteri are more likely to present breech or transverse, with the fetal head in one horn and the feet in the other. This will often necessitate cesarean delivery. If the fetus is vertex (head down), the two horns may not contract in coordination, or the horn that does not contain the pregnancy may interfere with contractions and descent of the fetus, causing obstructed labor. Effect on intrauterine device usage
Usage of intrauterine device (IUD) with copper requires one IUD in each horn to be effective in case of bicornuate uterus. The same practice is generally applied when using IUD with progestogen due to lack of evidence of efficacy with only one IUD. Evidence is lacking regarding progestogen IUD usage for menorrhagia in bicornuate uterus, but a case report showed good effect with a single IUD. References


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